Question

Give any two differences between order and molecularity of a reaction.

Hint:

Order is experimentally determined, while molecularity is based on the number of reactant molecules involved in an elementary step of the reaction.

Answer 1

- Order of reaction is the sum of the powers of the concentrations of reactants in the rate law expression, while molecularity is the number of molecules (or ions) that collide to give a reaction.
- The order of a reaction is determined experimentally, whereas molecularity can be determined from the stoichiometry of the reaction.