Write two differences between homogeneous catalysis and heterogeneous catalysis.

Explanation

Homogeneous catalysis : 1. In homogeneous catalysis the physical state of the catalyst is in the same phase of the reactants e.g.,
`2SO_2 (g) + O_2 (g) overset(NO(g))hArr 2SO_3 (g)`
2. It is based on the ability of elements to have different oxidation states.
Heterogeneous catalysis : 1. In heterogeneous catalysis the catalyst is in different phase than that of the reactants e.g,
`2SO_2 (g) + O_2 (g) overset(V_2 O_5 (s))hArr 2SO_3 (g)`
2. It is base on the theory of adsorption .