(i) This theory is applicable to reactions between gases in the presence of a solid catalyst. Some typical examples are as follows.
(ii) The contact process for the oxidation of to with atmospheric oxygen in the presence of platinum as the catalyst.
(iii) The Haber’s process for the synthesis of ammonia with iron as the catalyst.
(iv) Adsorption results in the loosening of the chemical bonds in the reactant molecules, so that their rupture becomes easier. This is confirmed by the observed lower activation energies for heterogeneous catalytic reactions in the presence of the catalysts as compared to that for the same reaction in the absence of the catalyst.