The document summarizes key concepts in thermodynamics including:
- The second law of thermodynamics which states that heat cannot spontaneously flow from a colder body to a hotter body.
- Closed, open, and isolated systems. A closed system does not allow matter to enter or leave, an open system does, and an isolated system exchanges neither energy nor matter.
- Properties of systems including intensive properties which do not depend on mass like temperature and pressure, and extensive properties which do depend on mass like volume.
- A cycle occurs when a process returns a system to its initial state. An ideal gas follows Boyle's law that pressure and volume are inversely proportional.
Unit 1 thermodynamics by varun pratap singh (2020-21 Session)Varun Pratap Singh
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https://sites.google.com/view/varunpratapsingh/teaching-engagements
Dear Students,
Please find the Basic Mechanical Engineering (TME-101, 2020-21 Session) Unit One notes in this section.
Topic cover in this section are:
UNIT-1: Fundamental Concepts and Definitions
Definition of thermodynamics, System, Surrounding and universe, Phase, Concept of continuum, Macroscopic & microscopic point of view. Density, Specific volume, Pressure, temperature. Thermodynamic equilibrium, Property, State, Path, Process, Cyclic and non-cyclic processes, Reversible and irreversible processes, Quasi-static process, Energy and its forms, Enthalpy.
Unit 1 thermodynamics by varun pratap singh (2020-21 Session)Varun Pratap Singh
Free Download Link (Copy URL):
https://sites.google.com/view/varunpratapsingh/teaching-engagements
Dear Students,
Please find the Basic Mechanical Engineering (TME-101, 2020-21 Session) Unit One notes in this section.
Topic cover in this section are:
UNIT-1: Fundamental Concepts and Definitions
Definition of thermodynamics, System, Surrounding and universe, Phase, Concept of continuum, Macroscopic & microscopic point of view. Density, Specific volume, Pressure, temperature. Thermodynamic equilibrium, Property, State, Path, Process, Cyclic and non-cyclic processes, Reversible and irreversible processes, Quasi-static process, Energy and its forms, Enthalpy.
In this PPT have have covered
1. Basic thermodynamics definition
2. Thermodynamics law
3. Properties , cycle, Process
4. Derivation of the Process
5.Formula for the numericals.
This topic is use full for those students who want to study basic thermodynamics as a part of their University syllabus.
Most of the university having basic Mechanical engineering as a subject and in this subject Thermodynamics is a topic so by this PPT our aim is to give presentable knowledge of the subject
Basic Mechanical Engineering Unit 4 Thermodynamics@by V.P.SinghVarun Pratap Singh
Download Link (Copy URL):
https://sites.google.com/view/varunpratapsingh/teaching-engagements
Basic Mechanical Engineering Unit 4 Thermodynamics for B.Tech. First-year students
Unit IV:
Thermodynamics: Thermodynamic system, properties, state, process, Zeroth, First and second law of thermodynamics, thermodynamic processes at constant pressure, volume, enthalpy & entropy.
Steam Engineering: Classification and working of boilers, mountings, and accessories of boilers, steam properties, use of steam tables, P-V, T-S diagram
These slides cover detailed information about laws of thermodynamics.It include 1st law definition and then its limitation and then entropy etc.Once you read this you will get know about detailed concept of thermodynamics and its laws with examples.
In this PPT have have covered
1. Basic thermodynamics definition
2. Thermodynamics law
3. Properties , cycle, Process
4. Derivation of the Process
5.Formula for the numericals.
This topic is use full for those students who want to study basic thermodynamics as a part of their University syllabus.
Most of the university having basic Mechanical engineering as a subject and in this subject Thermodynamics is a topic so by this PPT our aim is to give presentable knowledge of the subject
Basic Mechanical Engineering Unit 4 Thermodynamics@by V.P.SinghVarun Pratap Singh
Download Link (Copy URL):
https://sites.google.com/view/varunpratapsingh/teaching-engagements
Basic Mechanical Engineering Unit 4 Thermodynamics for B.Tech. First-year students
Unit IV:
Thermodynamics: Thermodynamic system, properties, state, process, Zeroth, First and second law of thermodynamics, thermodynamic processes at constant pressure, volume, enthalpy & entropy.
Steam Engineering: Classification and working of boilers, mountings, and accessories of boilers, steam properties, use of steam tables, P-V, T-S diagram
These slides cover detailed information about laws of thermodynamics.It include 1st law definition and then its limitation and then entropy etc.Once you read this you will get know about detailed concept of thermodynamics and its laws with examples.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
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Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
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We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
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Slides from:
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
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https://www.etran.rs/2024/en/home-english/
Salas, V. (2024) "John of St. Thomas (Poinsot) on the Science of Sacred Theol...Studia Poinsotiana
I Introduction
II Subalternation and Theology
III Theology and Dogmatic Declarations
IV The Mixed Principles of Theology
V Virtual Revelation: The Unity of Theology
VI Theology as a Natural Science
VII Theology’s Certitude
VIII Conclusion
Notes
Bibliography
All the contents are fully attributable to the author, Doctor Victor Salas. Should you wish to get this text republished, get in touch with the author or the editorial committee of the Studia Poinsotiana. Insofar as possible, we will be happy to broker your contact.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
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2. System, Boundary and Surroundings
STATEMENTS OF SECOND LAW OF THERMODYNAMICS
The second law of thermodynamics has been enunciated meticulously by Clausius,
Kelvin and Planck in slightly different words although both statements are basically
identical. Each statement is based on an irreversible process. The first considers
transformation of heat between two thermal reservoirs while the second considers the
transformation of heat into work.
Clausius Statement
“It is impossible for a self acting machine working in a cyclic process unaided by any
external agency, to transfer heat from a body at a lower temperature to a body at a
higher temperature”. In other words, heat of, itself, cannot flow from a colder to a hotter
body.
Kelvin-Planck Statement
“It is impossible to construct an engine, which while operating in a cycle produces no
other effect except to extract heat from a single reservoir and do equivalent amount of
work”. Although the Clausius and Kelvin-Planck statements appear to be different, they
are really equivalent in the sense that a violation of either statement implies violation of
other.
3. Closed System If the boundary of the system is impervious to the
flow of matter, it is called a closed system. An example of this system is
mass of gas or vapor contained in an engine cylinder, the boundary of
which is drawn by the cylinder walls, the cylinder head and piston
crown. Here the boundary is continuous and no matter may enter or
leave. Open System An open system is one in which matter flows into
or out of the system. Most of the engineering systems are open.
Isolated System An isolated system is that system which exchanges
neither energy nor matter with any other system or with environment.
Adiabatic System An adiabatic system is one which is thermally
insulated from its surroundings. It can, however, exchange work with
its surroundings. If it does not, it becomes an isolated system.
4.
5. Phase. A phase is a quantity of matter which is homogeneous
throughout in chemical composition and physical structure.
Homogeneous System
A system which consists of a single phase is termed as
homogeneous system. Examples : Mixture of air and water
vapour, water plus nitric acid and octane plus heptane.
Heterogeneous System
A system which consists of two or more phases is called a
heterogeneous system. Examples:Water plus steam, ice plus
water and water plus oil.
6. MACROSCOPIC AND MICROSCOPIC POINTS OF VIEW
Thermodynamic studies are undertaken by the following two different approaches. 1.
Macroscopic approach—(Macro mean big or total)
2. Microscopic approach—(Micro means small)
THERMODYNAMIC EQUILIBRIUM
A system is in thermodynamic equilibrium if the temperature and pressure at all
points are same ; there should be no velocity gradient ; the chemical equilibrium is
also necessary.
Systems under temperature and pressure equilibrium but not under chemical
equilibrium are sometimes said to be in metastable equilibrium conditions. It is only
under thermodynamic equilibrium conditions that the properties of a system can be
fixed. Thus for attaining a state of thermodynamic equilibrium the following three
types of equilibrium states must be achieved:
7. 1.Thermal equilibrium. The temperature of the
system does not change with time and has same
value at all points of the system
2. Mechanical equilibrium. There are no unbalanced
forces within the system or between the surroundings. The
pressure in the system is same at all points and does not
change with respect to time.
3. Chemical equilibrium. No chemical reaction takes
place in the system and the chemical composition which is
same throughout the system does not vary with time.
8. PROPERTIES OF SYSTEMS
A property of a system is a characteristic of the system which
depends upon its state, but not upon how the state is reached.
There are two sorts of property :
1. Intensive properties. These properties do not depend on the mass
of the system. Examples : Temperature and pressure.
2. Extensive properties. These properties depend on the mass of the
system. Example : Volume. Extensive properties are often divided by
mass associated with them to obtain the intensive properties. For
example, if the volume of a system of mass m is V, then the specific
volume of matter within the system is V/m = v which is an intensive
property
9. CYCLE
Any process or series of processes whose end states are identical is
termed a cycle. The processes through which the system has passed
can be shown on a state diagram, but a complete section of the path
requires in addition a statement of the heat and work crossing the
boundary of the system.
Ideal Gas From experimental observations it has been established
that an ideal gas (to a good approximation) behaves according to
the simple equation pV = mRT
where p, V and T are the pressure, volume and temperature of gas having mass
m and R is a constant for the gas known as its gas constant. Eqn. can be written
as pv = RT (where v = V/m)
10. In reality there is no gas which can be qualified as an ideal or
perfect gas. However all gases tend to ideal or perfect gas behaviour
at all temperatures as their pressure approaches zero pressure.
For two states of the gas, Eq. Above can be written as
P1V1/T1=P2V2/T2
T2/T1=( P2/P1 ) ( V2/V1 )
Example : A fluid at a pressure of 3 bar, and with specific volume of
0.18 m3/kg, contained in a cylinder behind a piston expands reversibly
to a pressure of 0.6 bar according to a law, p =
𝑪
𝑽²
where C is a
constant. Calculate the work done by the fluid on the piston