The molecularity of a reaction represents the number of atoms, molecules, or ions that will interfere with each other for the chemical reaction to occur within a limited time frame. The main differences between order and order of reaction are given below.
|The number of ions or molecules that take part in the rate-determining step is known as molecularity.||The sum of powers to which the reactant concentrations are raised in the rate law equation is known as the order of the reaction.|
|The molecularity of a reaction is a whole number other than zero. Its values are limited from 1 to 3.||It can either be a whole number or a fraction. Therefore, it can be 0, 1, 2, 3 or even a fraction.|
|The molecularity of the reaction is determined by looking at the reaction mechanism||The order of the reaction is determined by the experimental methods|
|The molecularity of the reaction is obtained by the rate-determining step||The order of the reaction is obtained by the sum of the powers to which the reactant concentrations are raised in the rate law equation|