1)order of reactions
2)second order of reaction
3)units of 2nd order reaction
4) rate equation of second order reaction
5) 2nd order reaction with different initial concentration and equal concentration of reactant
This document discusses kinetics and order of reactions. It defines zero, first, and second order reactions based on how the rate of reaction depends on the concentrations of reactants. Zero order reactions have rates independent of concentrations. First order rates depend on one concentration. Second order can depend on two concentrations. Methods for determining reaction order include substitution, initial rates, plotting data, and half-life determination. Complex reactions with opposing, consecutive, or parallel pathways are also discussed.
1) A rate equation summarizes the rate of reaction based on changes in reactant concentrations and can take the form of Rate = k[A]n[B]m, where k is the rate constant, n and m are orders of the reaction with respect to reactants A and B, and the overall order is n+m.
2) The rate equations and their graphical representations are different for zero order (rate is independent of concentration), first order (rate is proportional to concentration), and second order (rate is proportional to concentration squared) reactions.
3) The order of reactants in a rate equation can be determined experimentally by measuring rates at different initial concentrations.
Difference between order and molecularity of a reaction 2310Prawin Ddy
The order of a reaction refers to the sum of the powers of the concentration terms in the rate equation. It represents the number of molecules or atoms involved in the rate determining step. The document discusses zero, first, second, and third order reactions, providing examples and equations for determining the rate constant and half-life for each order. Molecularity refers to the actual number of reactant species involved in the elementary reaction step and can only be 1, 2, or 3, whereas order is a measurable property determined from the rate equation.
This document discusses kinetics and reaction order. It defines zero, first, and second order reactions based on which concentration terms determine the reaction rate. Zero order reactions do not depend on reactant concentration. First order reactions depend on one concentration term, and second order reactions depend on two concentration terms. The document provides rate equations and methods for determining reaction order, including graphical methods of plotting concentration vs. time data.
This document discusses key concepts in chemical kinetics including:
1) Chemical kinetics deals with the rates of chemical reactions and their mechanisms.
2) The rate of a reaction is defined as the decrease in reactant concentration or increase in product concentration over time.
3) The order of a reaction refers to the power to which the concentration of a reactant is raised in the rate law expression.
This document discusses chemical kinetics and factors that influence the degradation of pharmaceutical products. It covers topics like reaction rates, rate laws, reaction order, rate constants, and factors affecting chemical degradation. Specifically, it describes common chemical degradation pathways for drugs like hydrolysis, oxidation, isomerization, and how physical factors like temperature, solvent, and polymorphism can also cause degradation. The goal of stability testing is to determine the quality, shelf life, and recommended storage conditions for drug substances and products.
1)order of reactions
2)second order of reaction
3)units of 2nd order reaction
4) rate equation of second order reaction
5) 2nd order reaction with different initial concentration and equal concentration of reactant
This document discusses kinetics and order of reactions. It defines zero, first, and second order reactions based on how the rate of reaction depends on the concentrations of reactants. Zero order reactions have rates independent of concentrations. First order rates depend on one concentration. Second order can depend on two concentrations. Methods for determining reaction order include substitution, initial rates, plotting data, and half-life determination. Complex reactions with opposing, consecutive, or parallel pathways are also discussed.
1) A rate equation summarizes the rate of reaction based on changes in reactant concentrations and can take the form of Rate = k[A]n[B]m, where k is the rate constant, n and m are orders of the reaction with respect to reactants A and B, and the overall order is n+m.
2) The rate equations and their graphical representations are different for zero order (rate is independent of concentration), first order (rate is proportional to concentration), and second order (rate is proportional to concentration squared) reactions.
3) The order of reactants in a rate equation can be determined experimentally by measuring rates at different initial concentrations.
Difference between order and molecularity of a reaction 2310Prawin Ddy
The order of a reaction refers to the sum of the powers of the concentration terms in the rate equation. It represents the number of molecules or atoms involved in the rate determining step. The document discusses zero, first, second, and third order reactions, providing examples and equations for determining the rate constant and half-life for each order. Molecularity refers to the actual number of reactant species involved in the elementary reaction step and can only be 1, 2, or 3, whereas order is a measurable property determined from the rate equation.
This document discusses kinetics and reaction order. It defines zero, first, and second order reactions based on which concentration terms determine the reaction rate. Zero order reactions do not depend on reactant concentration. First order reactions depend on one concentration term, and second order reactions depend on two concentration terms. The document provides rate equations and methods for determining reaction order, including graphical methods of plotting concentration vs. time data.
This document discusses key concepts in chemical kinetics including:
1) Chemical kinetics deals with the rates of chemical reactions and their mechanisms.
2) The rate of a reaction is defined as the decrease in reactant concentration or increase in product concentration over time.
3) The order of a reaction refers to the power to which the concentration of a reactant is raised in the rate law expression.
This document discusses chemical kinetics and factors that influence the degradation of pharmaceutical products. It covers topics like reaction rates, rate laws, reaction order, rate constants, and factors affecting chemical degradation. Specifically, it describes common chemical degradation pathways for drugs like hydrolysis, oxidation, isomerization, and how physical factors like temperature, solvent, and polymorphism can also cause degradation. The goal of stability testing is to determine the quality, shelf life, and recommended storage conditions for drug substances and products.
Chemical kinetics is the study of reaction rates and mechanisms. The rate of a reaction describes how quickly reactants are converted to products and is affected by factors like concentration, temperature, catalysts, and surface area. The rate law expresses the reaction rate in terms of reactant concentrations and can be used to determine the order of a reaction. Integrated rate laws relate concentration over time and are used to calculate quantities like half-life, the time for half the reactants to be consumed.
This document discusses reaction kinetics, including the order of reactions, factors that influence reaction rates, and complexation. It defines zero, first, second, and pseudo-first order reactions based on their rate equations. Reaction rates can be influenced by physical factors like temperature, pH, and light exposure as well as chemical factors like acid-base catalysis and oxidation-reduction. Complexation refers to chemical reactions where a metal ion binds to a ligand containing an unshared pair of electrons.
Chemical kinematics deals with the rates of chemical reactions and their mechanisms. The rate constant in a rate law, such as the rate law d[A]/dt = k[A], is independent of concentration but depends on factors like temperature. The order of a reaction is the sum of the powers of the concentration terms in its rate equation. Common orders of reaction include zero-order, where the rate is independent of reactant concentration, first-order, where the rate depends on one concentration term, and second-order, where the rate depends on two concentration terms. Higher order reactions are also possible but are more complex.
This document provides an overview of C-13 NMR spectroscopy. It discusses the history and principle of NMR spectroscopy, focusing on C-13. Key points include: C-13 has a nuclear spin of 1/2, allowing it to be detected by NMR, unlike C-12. The chemical shift range for C-13 is much broader than for proton NMR, from 0-220 ppm. The number of C-13 signals indicates the number of non-equivalent carbon types in a molecule. C-13 coupling is observed with directly bonded protons and other nearby nuclei. Applications of C-13 NMR include structure elucidation of organic and biochemical compounds.
The document discusses various factors that affect the stability of metal complexes. It explains that complexes formed with ligands having higher charge and smaller size are generally more stable. It also discusses the Irving-Williams order of stability and the factors of charge to radius ratio, electronegativity, and basicity of ligands. The chelate effect is described as an important ligand effect where multidentate ligands form more stable complexes due to entropy gains. Kinetic and thermodynamic stability are distinguished from reactivity concepts of labile and inert complexes.
This document provides background information on reaction rates and mechanisms. It discusses how factors like reactant concentrations, temperature, catalysts, and surface area can influence reaction rates. It also defines concepts like the rate law, rate constant, reaction order, energy of activation, and Arrhenius equation. Methods for determining reaction order are described, including by varying reactant concentrations and analyzing integrated rate expressions for zero, first, and second order reactions. The effects of temperature on reaction rates are also addressed through the Arrhenius equation.
This document provides an overview of chemical kinetics and reaction rates. It discusses:
1) Chemical kinetics deals with how fast chemical reactions occur and the factors that affect reaction rates.
2) Reaction rates can vary significantly, from fractions of a second to years, as seen in examples of iron rusting and silver chloride formation.
3) The study of chemical kinetics involves determining rates of reaction, factors affecting rates, and reaction mechanisms.
It then provides examples and methods for determining reaction order and the effect of temperature on reaction rates.
Definition of reaction kinetics, law of mass action, rates of reaction- zero, first, second, pseudo zero & pseudo first order reaction, molecularity of reaction, determination of reaction order- graphic method, substitution method, half life method.
Factors affecting IR absorption frequency Vrushali Tambe
1. Many factors affect the absorption frequency in IR spectroscopy, including reduced mass, bond strength, hydrogen bonding, electronic effects, and molecular structure.
2. Coupling between vibrations and Fermi resonance can cause frequency shifts and intensity changes. Hydrogen bonding causes broad bands while strong bonds absorb at higher frequencies.
3. Electronic effects like induction, mesomerism, and conjugation influence frequency by altering bond strength. Ring size, hybridization, and physical state also impact the absorption frequency.
Introduction
Differential scanning calorimetry (DSC) measure the difference among the heat flow to the sample and the reference pan that flows undergo with controlled temperature program. Heat flow corresponds to transmitted power and is estimated in watts (W). The change in enthalpy after absorbing the energy is term as endothermic reaction and when the sample releases the energy is termed as exothermic reaction.
Different thermal events measured by DSC such as crystallisation, onset of oxidation, melting, cure reaction and heats of transitions i.e. enthalpy.
Chem 2 - Chemical Kinetics IV: The First-Order Integrated Rate LawLumen Learning
This document discusses first-order chemical kinetics. It defines the differential and integrated rate laws for first-order reactions and shows that the integrated rate law results in an exponential decay equation. It also describes how to experimentally determine reaction order by plotting the natural log of concentration versus time and identifying linear trends. The half-life of a first-order reaction is derived and shown to be 0.693/k, where k is the rate constant, meaning half-life does not depend on initial concentration.
1) Reaction rates depend on temperature and concentration according to the Arrhenius equation, with the rate constant k increasing exponentially with temperature. This is because higher temperatures cause molecules to move faster and collide more frequently, increasing the probability of reaction.
2) Kinetics can be first order, second order, or other orders depending on how the reaction rate depends on the concentrations of reactants. First order reactions follow exponential decay, while second order reactions have a more complex concentration dependence.
3) Half-lives characterize how long it takes for the concentration of a reactant to reduce to half its initial value, and can be used to determine reaction orders and rate constants from experimental data.
This document discusses methods for determining the order of a chemical reaction:
1) The half-life method determines order based on how the time taken for half the reaction to complete varies with the initial concentration of reactants. For nth order reactions, half-life is inversely proportional to the (n-1) power of the initial concentration.
2) The graphical method plots reaction rate against the concentration term (e.g. for first order, plot rate against [A-x]) to determine if the relationship is linear, indicating order. Alternatively, plotting log(rate) against log(concentration term) yields the reaction order from the slope.
3) The Ostwald method analyzes independent reactions at different
Ion exchange chromatography is a technique used to separate mixtures of similarly charged ions using an ion exchange resin. The resin works by reversibly exchanging ions between those present in the solution and the resin. There are different types of ion exchange resins classified by their chemical nature (strong/weak cation or anion exchangers) and source (natural or synthetic). Successful ion exchange requires the resin to be chemically stable, insoluble, sufficiently cross-linked, and contain exchange groups.
This document discusses key concepts in chemical kinetics including:
- Rate of reaction is defined as the change in concentration of reactants or products per unit time. Rate laws describe how the rate of reaction depends on reactant concentrations.
- Order of reaction refers to the sum of powers of concentrations in the rate law. Molecularity is the actual number of reacting species.
- Reaction orders include zero order (independent of concentration), first order, and second order reactions. Integrated rate equations relate concentration changes to rate constants for each order.
- Factors like temperature, solvent, ionic strength, and catalysis influence reaction rates as described by theories like collision theory and Arrhenius equation. Determining
Crown ethers are cyclic chemical compounds consisting of a ring containing several ether groups. Common crown ethers include tetramer, pentamer, and hexamer of ethylene oxide. The term "crown" refers to their resemblance to a crown sitting on a person's head when bound to a cation. Crown ethers have applications in synthesis such as esterification and aromatic substitution reactions. They also have analytical applications such as determination of metals in geological samples and use as phase transfer catalysts.
The document discusses reaction kinetics and methods for determining reaction rates. It defines reaction rate and explains how to express reaction rates using concentration changes over time. It also discusses calculating reaction rates from experimental data and determining the rate laws and orders of reactions. Integrated rate laws that relate concentration to time for first-order reactions are also covered, including calculating rate constants and half-lives. The Arrhenius equation, which relates reaction rate to temperature, is introduced.
This document discusses chemical kinetics and reaction rates. It explains that kinetics studies how fast chemical reactions occur. The rate of a reaction depends on factors like the concentrations of reactants, temperature, and presence of catalysts. Reaction rates can be determined by measuring changes in concentration over time. The order of a reaction indicates how the rate depends on reactant concentrations. First-order and second-order reactions follow distinct rate laws that allow calculation of rate constants from experimental data. Reaction mechanisms involve elementary steps that may be fast or slow, with the overall rate determined by the slowest step.
Chemical kinetics is the study of reaction rates and mechanisms. The rate of a reaction describes how quickly reactants are converted to products and is affected by factors like concentration, temperature, catalysts, and surface area. The rate law expresses the reaction rate in terms of reactant concentrations and can be used to determine the order of a reaction. Integrated rate laws relate concentration over time and are used to calculate quantities like half-life, the time for half the reactants to be consumed.
This document discusses reaction kinetics, including the order of reactions, factors that influence reaction rates, and complexation. It defines zero, first, second, and pseudo-first order reactions based on their rate equations. Reaction rates can be influenced by physical factors like temperature, pH, and light exposure as well as chemical factors like acid-base catalysis and oxidation-reduction. Complexation refers to chemical reactions where a metal ion binds to a ligand containing an unshared pair of electrons.
Chemical kinematics deals with the rates of chemical reactions and their mechanisms. The rate constant in a rate law, such as the rate law d[A]/dt = k[A], is independent of concentration but depends on factors like temperature. The order of a reaction is the sum of the powers of the concentration terms in its rate equation. Common orders of reaction include zero-order, where the rate is independent of reactant concentration, first-order, where the rate depends on one concentration term, and second-order, where the rate depends on two concentration terms. Higher order reactions are also possible but are more complex.
This document provides an overview of C-13 NMR spectroscopy. It discusses the history and principle of NMR spectroscopy, focusing on C-13. Key points include: C-13 has a nuclear spin of 1/2, allowing it to be detected by NMR, unlike C-12. The chemical shift range for C-13 is much broader than for proton NMR, from 0-220 ppm. The number of C-13 signals indicates the number of non-equivalent carbon types in a molecule. C-13 coupling is observed with directly bonded protons and other nearby nuclei. Applications of C-13 NMR include structure elucidation of organic and biochemical compounds.
The document discusses various factors that affect the stability of metal complexes. It explains that complexes formed with ligands having higher charge and smaller size are generally more stable. It also discusses the Irving-Williams order of stability and the factors of charge to radius ratio, electronegativity, and basicity of ligands. The chelate effect is described as an important ligand effect where multidentate ligands form more stable complexes due to entropy gains. Kinetic and thermodynamic stability are distinguished from reactivity concepts of labile and inert complexes.
This document provides background information on reaction rates and mechanisms. It discusses how factors like reactant concentrations, temperature, catalysts, and surface area can influence reaction rates. It also defines concepts like the rate law, rate constant, reaction order, energy of activation, and Arrhenius equation. Methods for determining reaction order are described, including by varying reactant concentrations and analyzing integrated rate expressions for zero, first, and second order reactions. The effects of temperature on reaction rates are also addressed through the Arrhenius equation.
This document provides an overview of chemical kinetics and reaction rates. It discusses:
1) Chemical kinetics deals with how fast chemical reactions occur and the factors that affect reaction rates.
2) Reaction rates can vary significantly, from fractions of a second to years, as seen in examples of iron rusting and silver chloride formation.
3) The study of chemical kinetics involves determining rates of reaction, factors affecting rates, and reaction mechanisms.
It then provides examples and methods for determining reaction order and the effect of temperature on reaction rates.
Definition of reaction kinetics, law of mass action, rates of reaction- zero, first, second, pseudo zero & pseudo first order reaction, molecularity of reaction, determination of reaction order- graphic method, substitution method, half life method.
Factors affecting IR absorption frequency Vrushali Tambe
1. Many factors affect the absorption frequency in IR spectroscopy, including reduced mass, bond strength, hydrogen bonding, electronic effects, and molecular structure.
2. Coupling between vibrations and Fermi resonance can cause frequency shifts and intensity changes. Hydrogen bonding causes broad bands while strong bonds absorb at higher frequencies.
3. Electronic effects like induction, mesomerism, and conjugation influence frequency by altering bond strength. Ring size, hybridization, and physical state also impact the absorption frequency.
Introduction
Differential scanning calorimetry (DSC) measure the difference among the heat flow to the sample and the reference pan that flows undergo with controlled temperature program. Heat flow corresponds to transmitted power and is estimated in watts (W). The change in enthalpy after absorbing the energy is term as endothermic reaction and when the sample releases the energy is termed as exothermic reaction.
Different thermal events measured by DSC such as crystallisation, onset of oxidation, melting, cure reaction and heats of transitions i.e. enthalpy.
Chem 2 - Chemical Kinetics IV: The First-Order Integrated Rate LawLumen Learning
This document discusses first-order chemical kinetics. It defines the differential and integrated rate laws for first-order reactions and shows that the integrated rate law results in an exponential decay equation. It also describes how to experimentally determine reaction order by plotting the natural log of concentration versus time and identifying linear trends. The half-life of a first-order reaction is derived and shown to be 0.693/k, where k is the rate constant, meaning half-life does not depend on initial concentration.
1) Reaction rates depend on temperature and concentration according to the Arrhenius equation, with the rate constant k increasing exponentially with temperature. This is because higher temperatures cause molecules to move faster and collide more frequently, increasing the probability of reaction.
2) Kinetics can be first order, second order, or other orders depending on how the reaction rate depends on the concentrations of reactants. First order reactions follow exponential decay, while second order reactions have a more complex concentration dependence.
3) Half-lives characterize how long it takes for the concentration of a reactant to reduce to half its initial value, and can be used to determine reaction orders and rate constants from experimental data.
This document discusses methods for determining the order of a chemical reaction:
1) The half-life method determines order based on how the time taken for half the reaction to complete varies with the initial concentration of reactants. For nth order reactions, half-life is inversely proportional to the (n-1) power of the initial concentration.
2) The graphical method plots reaction rate against the concentration term (e.g. for first order, plot rate against [A-x]) to determine if the relationship is linear, indicating order. Alternatively, plotting log(rate) against log(concentration term) yields the reaction order from the slope.
3) The Ostwald method analyzes independent reactions at different
Ion exchange chromatography is a technique used to separate mixtures of similarly charged ions using an ion exchange resin. The resin works by reversibly exchanging ions between those present in the solution and the resin. There are different types of ion exchange resins classified by their chemical nature (strong/weak cation or anion exchangers) and source (natural or synthetic). Successful ion exchange requires the resin to be chemically stable, insoluble, sufficiently cross-linked, and contain exchange groups.
This document discusses key concepts in chemical kinetics including:
- Rate of reaction is defined as the change in concentration of reactants or products per unit time. Rate laws describe how the rate of reaction depends on reactant concentrations.
- Order of reaction refers to the sum of powers of concentrations in the rate law. Molecularity is the actual number of reacting species.
- Reaction orders include zero order (independent of concentration), first order, and second order reactions. Integrated rate equations relate concentration changes to rate constants for each order.
- Factors like temperature, solvent, ionic strength, and catalysis influence reaction rates as described by theories like collision theory and Arrhenius equation. Determining
Crown ethers are cyclic chemical compounds consisting of a ring containing several ether groups. Common crown ethers include tetramer, pentamer, and hexamer of ethylene oxide. The term "crown" refers to their resemblance to a crown sitting on a person's head when bound to a cation. Crown ethers have applications in synthesis such as esterification and aromatic substitution reactions. They also have analytical applications such as determination of metals in geological samples and use as phase transfer catalysts.
The document discusses reaction kinetics and methods for determining reaction rates. It defines reaction rate and explains how to express reaction rates using concentration changes over time. It also discusses calculating reaction rates from experimental data and determining the rate laws and orders of reactions. Integrated rate laws that relate concentration to time for first-order reactions are also covered, including calculating rate constants and half-lives. The Arrhenius equation, which relates reaction rate to temperature, is introduced.
This document discusses chemical kinetics and reaction rates. It explains that kinetics studies how fast chemical reactions occur. The rate of a reaction depends on factors like the concentrations of reactants, temperature, and presence of catalysts. Reaction rates can be determined by measuring changes in concentration over time. The order of a reaction indicates how the rate depends on reactant concentrations. First-order and second-order reactions follow distinct rate laws that allow calculation of rate constants from experimental data. Reaction mechanisms involve elementary steps that may be fast or slow, with the overall rate determined by the slowest step.
This document discusses chemical kinetics and reaction rates. It explains that kinetics studies how fast chemical reactions occur. The rate of a reaction depends on factors like the concentrations of reactants, temperature, and presence of catalysts. Reaction rates can be determined by measuring changes in concentration over time. The order of a reaction indicates how the rate depends on reactant concentrations. First-order and second-order reactions follow distinct rate laws that allow calculation of rate constants from experimental data. Reaction mechanisms involve elementary steps that describe the pathway by which reactants are converted to products.
The document discusses chemical kinetics, which is the study of reaction rates and mechanisms. It covers key topics such as:
- Reaction rates can be defined as the change in concentration of reactants or products over time.
- Instantaneous and average reaction rates, where instantaneous rate is preferable since rate changes over time.
- Rate laws express the reaction rate in terms of molar concentrations of reactants, with order of the reaction being the sum of exponents.
- Reaction orders can be determined experimentally and differ from stoichiometric coefficients. Integrated rate equations take different forms depending on the reaction order.
- Methods for determining the order of a reaction include differential, isolation, integration, and half-life
The document discusses chemical kinetics, which is the study of reaction rates and mechanisms. It covers key topics such as:
- Reaction rates can be defined as the change in concentration of reactants or products over time.
- Instantaneous and average reaction rates, where instantaneous rate is preferable since rate changes over time.
- Rate laws express the reaction rate in terms of molar concentrations of reactants, with order of the reaction being the sum of exponents.
- Reaction orders can be determined experimentally and differ from stoichiometric coefficients. Integrated rate equations take different forms depending on the reaction order.
- Methods for determining the order of a reaction include differential, isolation, integration, and half-life
This document is a literature review for a project on modeling fluid dynamics using spectral methods in MATLAB. It summarizes two key papers: (1) Balmforth et al.'s paper on modeling the dynamics of interfaces and layers in a stratified turbulent fluid, which derived coupled differential equations; and (2) Trefethen's book on spectral methods in MATLAB, which provided guidance on using Chebyshev polynomials and differentiation matrices. It also outlines the methodology used in Balmforth et al.'s paper and chapters from Trefethen's book on finite differences, Chebyshev points, and constructing Chebyshev differentiation matrices.
This document discusses methods for determining the order of a chemical reaction. It defines key terms like rate of reaction, order of reaction, molecularity, and half-life. It describes several methods to determine the order of a reaction:
1) The substitution method involves substituting concentration data into integrated rate equations for zero, first, and second order reactions to determine which gives a constant rate constant.
2) The graphical method plots concentration data versus time in different ways depending on the suspected order to identify linear relationships.
3) The half-life method examines how half-life depends on initial concentration to infer order.
4) Ostwald's isolation method determines partial orders with respect to each reactant by
This document discusses reaction rates and kinetics concepts including:
- Instantaneous reaction rates can be calculated from the slope of concentration-time graphs at specific points.
- Reaction orders and rate laws can be determined experimentally using methods like the initial rate method or integrated rate law method.
- First-order reactions follow the integrated rate law that the natural log of the concentration is linear with time. Second-order and zero-order reactions also have defining rate laws and kinetics equations.
The document discusses chemical kinetics, which examines the rates of chemical reactions and how they are influenced by conditions like concentration, temperature, and catalysts. It defines key terms like the rate of reaction, average rate, and instantaneous rate. The rate of reaction depends on factors like the concentrations of reactants, temperature, phase, and presence of catalysts or inhibitors. Reaction rate laws relate the reaction rate to concentrations and determine the order of reactions. Differential and integrated rate equations are also discussed.
This document discusses key concepts in reaction kinetics including order, molecularity, rate laws, rate constants, and factors that affect the rate of reaction. It defines order as the power dependence of rate on reactant concentrations in the rate law. Molecularity refers to the number of reactants colliding in an elementary reaction. Rate laws express the relationship between reaction rate and reactant concentrations. Rate constants are proportionality factors in rate laws. Zero, first, and second order reactions are described, and their rate equations, integrated forms, and graphical representations are provided. Factors like temperature, concentration, and catalysts that influence reaction rates are also outlined.
My notes for A2 Chemistry Unit 4, typed by me and compiled from various sources. I cannot trace back where everything came from but again shall any intellectual property rights be violated, please comment /contact me and I will try my best to rectify them as soon as possible.
1. Chemical kinetics deals with the rates of chemical reactions and factors that affect reaction rates. It examines how fast reactions occur and the mechanisms of reactions.
2. Reaction rates can vary significantly, from fractions of seconds to years. Third-order reactions involve three molecules and are also called termolecular reactions.
3. The rate of a reaction is affected by temperature - higher temperatures provide more energy and increase reaction rates by producing more effective collisions between reactant molecules.
kinetics of stability Molecular pharmaceuticsMittalGandhi
This document discusses kinetics of stability and reaction order. It defines key terms like rate, order of reaction, and molecularity. The main types of reaction order discussed are zero order, first order, pseudo first order, and second order. Graphs and equations to determine the rate constant and half-life are provided for each order. Methods for determining the experimental order of a reaction are outlined. Factors that can influence the reaction rate are also summarized. Tables listing the key equations for zero, first, and second order kinetics are included.
Non equilibrium thermodynamics in multiphase flowsSpringer
This chapter discusses the principle of microscopic reversibility and its implications. It can be summarized as follows:
1) The principle of microscopic reversibility states that the probability of a molecular process occurring is equal to the probability of the reverse process at equilibrium.
2) This leads to the rule of detailed balances and Onsager's reciprocity relations, which relate the linear response of a system to external perturbations to its intrinsic fluctuation properties.
3) The reciprocity relations require that the Onsager coefficients relating fluxes to forces be symmetric. Various formulations of the fluctuation-dissipation theorem are also derived from microscopic reversibility.
Non equilibrium thermodynamics in multiphase flowsSpringer
This chapter discusses the principle of microscopic reversibility and its implications. It can be summarized as follows:
1) The principle of microscopic reversibility states that the probability of a molecular process occurring is equal to the probability of the reverse process at equilibrium.
2) This leads to the rule of detailed balances and Onsager's reciprocity relations, which relate the linear response of a system to external perturbations to its intrinsic fluctuation properties.
3) The reciprocity relations require that the Onsager coefficients relating fluxes to forces be symmetric. Various formulations of the fluctuation-dissipation theorem are also derived from microscopic reversibility.
- The document discusses concepts related to chemical kinetics including reaction rates, rate laws, reaction mechanisms, and reaction orders.
- Key concepts covered include determining rate laws through experimental methods, distinguishing between differential and integrated rate laws, and characteristics of reactions that are zero order, first order, or second order.
- Examples are provided to illustrate determining the order of reactions and calculating rate constants from experimental data using integrated rate laws.
A semi analytic method for solving two-dimensional fractional dispersion equa...Alexander Decker
This document presents a semi-analytic method called the modified decomposition method for solving two-dimensional fractional dispersion equations. The method is applied to solve a two-dimensional fractional dispersion equation subject to initial and boundary conditions. The numerical results obtained from the modified decomposition method are shown to closely match the exact solution, demonstrating the accuracy of this approach. The method provides an efficient means of obtaining analytical solutions to fractional differential equations.
Oscillation results for second order nonlinear neutral delay dynamic equation...inventionjournals
In this paper, we establish sufficient conditions for the oscillation of solutions of second order neutral delay dynamic equations [r (t )( x (t ) p (t ) x ( (t ))) ] q (t ) f ( x ( (t ))) = 0 on an arbitrary time scale 핋.
This document discusses light-matter interaction using a two-level atom model. It describes how an atom with only two energy levels can be modeled as a two-dimensional quantum mechanical system. The interaction of such a two-level atom with an electromagnetic field is then derived, leading to Rabi oscillations between the atomic energy levels driven by the field. Dissipative processes require a statistical description using the density operator formalism.
This document discusses reaction kinetics and rate laws. It explains that the rate of a reaction can be defined based on the disappearance of reactants or appearance of products over time. The rate law expression relates the reaction rate to the concentrations of reactants and has the form Rate = k[A]n[B]m, where k is the rate constant and n and m are the orders of reactants A and B. The orders must be determined experimentally by measuring initial rates as concentrations are varied. A first-order reaction has a rate that depends on just one reactant concentration. Integrating the differential rate law gives an integrated rate law relating concentration to time, such as the first-order rate law ln[A] = -kt + ln
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
Assessment and Planning in Educational technology.pptxKavitha Krishnan
In an education system, it is understood that assessment is only for the students, but on the other hand, the Assessment of teachers is also an important aspect of the education system that ensures teachers are providing high-quality instruction to students. The assessment process can be used to provide feedback and support for professional development, to inform decisions about teacher retention or promotion, or to evaluate teacher effectiveness for accountability purposes.
Physiology and chemistry of skin and pigmentation, hairs, scalp, lips and nail, Cleansing cream, Lotions, Face powders, Face packs, Lipsticks, Bath products, soaps and baby product,
Preparation and standardization of the following : Tonic, Bleaches, Dentifrices and Mouth washes & Tooth Pastes, Cosmetics for Nails.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
The simplified electron and muon model, Oscillating Spacetime: The Foundation...RitikBhardwaj56
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
How to Manage Your Lost Opportunities in Odoo 17 CRMCeline George
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
Main Java[All of the Base Concepts}.docxadhitya5119
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
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2. 1
Contents
Second order reaction.........................................................................................................................2
Reaction Rate.................................................................................................................................2
Examples of second order reaction..................................................................................................2
Types of second order reaction....................................................................................................2
Derivative and Integral Forms ......................................................................................................2
Case 1: A + A → P (Second Order with same reacting molecules)....................................................3
Case 2: A + B → P (Second Order Reaction with different reacting molecules).................................4
3. 2
Second order reaction
It isthe sumof the exponentsof concentrationtermof the reactantsinvolvedinthe rate expression.
Reaction Rate
Integrationof the second-orderrate law
−
𝒅[𝑨]
𝒅𝒕
= k[A]2
Examples of second order reaction
Following are the examples of second order reaction;
1. 2 HI → I2 + H2
Hydrogen Iodide decomposing into iodine gas and hydrogen gas.
2. O3 → O2 + O2
During combustion, oxygen atoms and ozone can form oxygen molecules.
3. O2 + C → O + CO
Another combustion reaction, oxygen molecules react with carbon to form
oxygen atoms and carbon monoxide.
4. O2 + CO → O + CO2
This reaction often follows the previous reaction. Oxygen molecules react with
carbon monoxide to form carbon dioxide and oxygen atoms.
5. 2 NOBr → 2 NO + Br2
In the gas phase, nitrosyl bromide decomposes into nitrogen oxide and bromine
gas.
6. NH4CNO → H2NCONH2
Ammonium cyanate in water isomerizes into urea.
7. CH3COOC2H5 + NaOH → CH3COONa + C2H5OH
An example of the hydrolysis of an ester in the presence of a base. In this case,
ethyl acetate in the presence of sodium hydroxide.
8. H+ + OH- → H2O
Hydrogen ions and hydroxy ions form water.
9. 2 NO2 → 2 NO + O2
Nitrogen dioxide decomposing into nitrogen monoxide and oxygen molecule.
Types of second order reaction
1. Whenthe concentrationof bothreacting,moleculesare same
2. Whenthe concentrationof bothreacting,moleculesare differentfromeachother
Derivative and Integral Forms
To describe how the rate of a second-order reaction changes with concentration of reactants or
products, the differential (derivative) rate equation is used as well as the integrated rate
4. 3
equation. The differential rate law shows that how the rate of the reaction changes in time,
while the integrated rate equation shows that how the concentration of species changes over
time. Both equations can be derived from the above expression for the reaction rate. Plotting
these equations can also help in determining either a certain reaction is second-order or not.
Case 1: A + A → P (Second Order with same reacting molecules)
Two of the same reactant (A) combine in a single elementary step.
A+A⟶P
2A⟶P
The reaction rate for this step can be written as
Rate=−
1
2
𝑑[𝐴]
𝑑𝑡
= +
𝑑[𝑃]
𝑑𝑡
and the rate of loss of reactant A
𝑑𝐴
𝑑𝑡
=−k[A][A] = −k[A]2
The rate at which A decreases can be expressed using the differential rate equation.
−
𝑑[𝐴]
𝑑𝑡
= k[A]2
The equation can then be rearranged
−
𝑑[ 𝐴]
[ 𝐴]2 = −kdt
Since we are interested in the change in concentration of an over a period, we integrate
between t=0 and t, the time of interest.
∫
𝑑[ 𝐴]
[ 𝐴]2
[𝐴] 𝑡
[𝐴]0
= −k∫ 𝑑𝑡
𝑡
0
To solve this, we use the following rule of integration (power rule)
∫
𝑑𝑥
𝑥2 = −
1
𝑥
+ constant
We obtain the following integrated rate equation
1
[𝐴] 𝑡
−
1
[𝐴]0
= kt
5. 4
rearranging the integrated rate equation, we obtain an equation of the line:
1
[𝐴] 𝑡
= kt +
1
[𝐴]0
The above equation directly relates to the graph which provides a linearrelationship.Inthis case,
and for all second order reactions, the linear plot of
1
[𝐴] 𝑡
versus time will yield the below graph.
This graph is useful in many ways. If we only know the concentrations at specific times for a
reaction, we can draw a graph like the one above. If the graph yields a straight line, then the
reaction must be second order. In addition, with this graph we can find the slope of the line and
this slope is k, the reaction constant. The concentration of reactants approaches zero more
slowly in a second-order, compared to that in a first order reaction.
Case 2: A + B → P (Second Order Reaction with different reacting molecules)
the rate at which A decreases can be expressed using the differential rate equation
6. 5
𝑑[𝐴]
𝑑𝑡
= −k[A][B]
in this case the initial concentration of the two reactants are not equal. Let x be
the concentration of each species reacted at time t.
Let [𝐴]0= a and [𝐵]0=b Then, [A]=a−x; [B]=b−x
The expression of rate law becomes
−
𝑑𝑥
𝑑𝑡
= −k([𝐴]0−x) ([𝐵]0−x)
which can be rearranged As
𝑑𝑥
[𝐴]0−x)( [𝐵]0−x)
= kdt
We integrate between t=0 (when x=0) and t, the time of interest.
∫
𝑑𝑥
[𝐴]0−𝑥)( [𝐵]0−𝑥)
𝑥
0
= 𝑘 ∫ 𝑑𝑡
𝑡
0
To solve this integral, we use the method of partial fractions
∫
1
(𝑎−𝑥)(𝑏−𝑥)
𝑥
0
dx =
1
𝑏−𝑎
(𝑙𝑛
1
𝑎−𝑥
− 𝑙𝑛
1
𝑏−𝑥
)
Evaluating the integral gives us:
∫
𝑑𝑥
[𝐴]0−𝑥)( [𝐵]0−𝑥)
𝑥
0
=
1
[ 𝐵]0−[ 𝐴]0
(𝑙𝑛
[𝐴]0
[𝐴]0−𝑥
− 𝑙𝑛
[𝐵]0
[𝐵]0−𝑥
)
Applying the rule of logarithm, the equation simplifies to:
∫
𝑑𝑥
[𝐴]0−𝑥)( [𝐵]0−𝑥)
𝑥
0
=
1
[ 𝐵]0−[ 𝐴]0
𝑙𝑛
[𝐵][𝐴]0
[𝐴][𝐵]0
We then obtain the integratedrateequation (underthe condition that [A] and [B]are not equal).
1
[ 𝐵]0 − [ 𝐴]0
𝑙𝑛
[𝐵][𝐴]0
[𝐴][𝐵]0
= 𝑘𝑡
Upon rearrangement of the integrated rate equation, we get
𝑙𝑛
[𝐵][𝐴]0
[𝐴][𝐵]0
= 𝑘([ 𝐵]0 − [ 𝐴]0 ) 𝑡
7. 6
Hence, from the last equation, we can see that a linear plot of 𝑙𝑛
[𝐴]0[𝐵]
[𝐴][𝐵]0
versus time is
characteristic of second-order reactions.
This graph can be used to find slope.
in form y = ax + b with a slope of a=k([B]0−[A]0) and a y-intercept of b = 𝑙𝑛
[𝐴]0
[𝐵]0
Unitsfor second orderreaction
Rate = k[A][B]
rate (𝑚𝑜𝑙 𝑑𝑚−3
𝑠−1
) [A][B] (𝑚𝑜𝑙 𝑑𝑚−3
)
𝑚𝑜𝑙 𝑑𝑚−3
𝑠−1
= k x 𝑚𝑜𝑙 𝑚−3
x 𝑚𝑜𝑙 𝑑𝑚−3
Rate = 𝒎𝒐𝒍−𝟏
𝒅𝒎 𝟑
𝒔−𝟏