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 The equation clearly shows that increase of temperature or lowering of Ea will
lead to an increase in the rate of reaction and presence of a catalyst lowers the
activation energy by providing an alternate path for the reaction