Question

The role of a catalyst is to change ...... .
(a) Gibbs energy of reaction
(b) enthalpy of reaction
(c) activation energy of reaction
(d) equilibrium constant

Answer 1

The role of a catalyst is to change the activation energy of reaction. This is done by either increasing or decreasing activation energy of molecule as catalyst are mainly of two types; +ve catalyst and -ve catalyst.

Note: Catalyst are of two types one is positive catalyst which increases rate of reaction by decreasing activation energy of activation.