How does a catalyst increase the rate of a reaction?

a) it decreases the enthalpy change of the reaction.

b) it lowers the potential energy of the reactants.

c) it provides a lower activation energy for the reaction.

d) it raises the potential energy of the products.

C) It provides a lower activation energy for the reaction.

Explanation:

Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.

A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more molecules can cross the energy barrier and convert to products.

The catalyst itself does not take part in the chemical reaction and is regenerated as such at the end.

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