The effect of a catalyst on the each of the given factors has to be briefly commented.
Activation energy: The minimum energy required for the collision to be effective for the colliding molecules is said to be activation energy. Activation energy plays an important role in chemical kinetics. It was introduced by Swedish scientist Svante Arrhenrius in 1889.
Reaction: Substances which are mutually involved each other in a chemical process and changed into different substances.
Mechanism of a reaction: The representation of step by step process involved in the chemical process is said to be mechanism of a chemical reaction.
Enthalpy: In thermodynamics, the total heat content of a system is equivalent to the thermodynamic quantity is said to be an enthalpy of a reaction.
Rate of reaction: It represents the speed at which a chemical reaction runs. How much concentration of reactants consumed and how much concentration of product formed in a unit of time is said to be rate of reaction.