Surface Chemistry

Surface Chemistry

Question

Write one difference in each of the following :
Homogeneous catalysis and Heterogeneous catalysis

Answer

Homogeneous catalysis: When the reactants and the catalyst are in same phase (i.e., Liquid or gas), the process is said to be homogeneous catalysis. For example, Oxidation of sulphur dioxide into sulphur trioxide with dioxygen in presence of oxides of nitrogen as the catalyst in the process.
2SO2(g) + O2(g)→ NO(g) +2SO3(g)

Heterogeneous catalysis: The catalytic process in which the reactant and the catalyst are in different phase is known as heterogeneous.For example Oxidation of sulphur dioxide into sulphur trioxide in the presence of Pt.
2SO2(g) + pt(s)→ 2SO3 (g)

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