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Chemical kinetics lec 1
- 1. Chemistry Lectures By Al-Chemist Youtube Channel 1/9/2021
- 2. 1/9/2021 Chemistry Lectures By Al-Chemist Youtube Channel
- 3. Chemical kinetics - speed or rate at which a reaction occurs How are rates of reactions affected by ◦ Reactant concentration? ◦ Temperature? ◦ Reactant states? ◦ Catalysts? Chemistry Lectures By Al-Chemist Youtube Channel 1/9/2021 Chemical Equilibrium = how far Chemical kinetics = how fast
- 4. The domain of chemistry in which we study the speed with which the reaction proceeds and the factors affecting the speed or rate. Hence, 1. Rate of Reactions 2. Factors Affecting The Reaction rate 3. Pathway of a reaction from reactants to products 1/9/2021 Chemistry Lectures By Al-Chemist Youtube Channel
- 5. The rate of a chemical reaction is defined as the change of concentration of reactants or product divided by the time taken for the change. Rate of Reaction= Change in concentration Time taken for change The rate of Reaction never remains uniform during the course of reaction. It decreases continuously till the reaction stops 1/9/2021 Chemistry Lectures By Al-Chemist Youtube Channel
- 6. Rate of a Reaction=moles dm -3 Seconds = moles dm -3 Sec- 1 1/9/2021 Chemistry Lectures By Al-Chemist Youtube Channel
- 7. The rate at any one instant is called Instantaneous rate Consider the following reaction A + B C Define the instantaneous rate of consumption of reactant A, A dt Ad A
- 8. The reaction rate during two specific intervals is called Average rate of a reaction Average rate=dx/dt During the start of reaction Instantaneous rate is higher than average rate.. Near the end the reverse happens As the time interval becomes smaller Instantaneous rate becomes closer to average rate 1/9/2021 Chemistry Lectures By Al-Chemist Youtube Channel
- 9. If a reaction proceeds in more than one steps the slowest step shall be counted as the rate determining step A+B--------- D A+B--------- C --------(i) fast C+B--------- D--------(ii) slow Ii will rate determing step
- 10. 1/9/2021 Chemistry Lectures By Al-Chemist Youtube Channel
- 11. 1/9/2021 Chemistry Lectures By Al-Chemist Youtube Channel