This document discusses reaction kinetics, which is the branch of chemistry that deals with the rates of chemical reactions, factors that affect rates, and reaction mechanisms. It defines rate of reaction as the change in concentration of a reactant or product over time. Examples of fast, moderate, and slow reaction rates are given. Graphs are used to explain instantaneous rates at different points during a reaction and average rates over time intervals. The specific rate constant or velocity constant describes the direct proportionality of reaction rate to reactant concentrations.

2. Reactionkinetics
 “ The branch of chemistry which deals
with
 rates of chemical reactions,
 Factors that affect the rates of chemical
reactions
and
The Mechanism of reaction is called reaction
kinectics

3. Rate of reaction
 “ The change in concentration of a
reactant or a product divided by the time
taken for the change is called rate of
reaction.”
Rate of reaction = change in
concentrion of the substance/time taken
for the change
Rate of reaction = ∆C/∆t

4.  Rate of reaction = mol.dm-3/s

5. Example of rates of reaction
with different rates
 Rapid reaction Rapid rate
 Moderate reation Moderate rate
 Slow reaction Slow rate

6. Graphical Explanation

7. Rate for reactants
Rate for products

8. Instantaneos rate
 “ The rate at any one instant duraning
the time interval is called the
instantaneous rate.”
 instantaneous rate
 At first the instantaneous rate is higher
than the average rate.

9. Average rate
 “ The rate of reaction between two
specific time intervals is called average
rate.
 average rate.
 At end, average rate is higher than
instantaneous rate.

10. Rate of reaction is an ever
change parameter
 Ans : …………………….……………..

11. Specific Rate constant or
Velocity Constant (K)
 “ The rate of a chemical reaction is
directly proportional to the active mass
of the reactant or to the product of active
masses if more than one products are
involved in a chemical reaction.”
 “ The specific rate of a reaction is the
rate of the reaction when concentration
of reactants are unity.”