Define the following:
(i) Order of a reaction
(ii) Activation energy of a reaction
(i)Order of a reaction:
1. It is the sum of powers of molar concentrations of reacting species in the rate equation of the reaction.
2. It may be a whole number, zero, fractional, positive or negative.
3. It is experimentally determined.
4. It is meant for the reaction and not for its individual steps.
(ii) Activation energy of a reaction: The minimum extra amount of energy absorbed by the reactant molecules to form the activated complex is called activation energy.