Its values are limited from 1 to 3 whereas order can be 0, 1, 2, 3 or
even a fraction Molecularity and order of an elementary reaction are same Temperature dependence of rate constants is described by Arrhenius equation
(k = Ae–Ea/RT) Ea corresponds to the activation energy and is given by the
energy difference between activated complex and the reactant molecules, and A
(Arrhenius factor or pre-exponential factor)  corresponds to  the collision frequency