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# In heterogenous catalysis of a gaseous reactants over solid catalyst

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## Heterogeneous catalysis:Heterogeneous catalysis is the reaction where the catalyst is in a different phase from the reactants and products.Hence, in a reaction of heterogeneous catalysis of a gaseous reactant over a solid catalyst, the reactant in the gaseous phase gets absorbed on the solid surface of the catalyst and proceeds to the reaction.Therefore solid phase heterogeneous catalysis involves molecular adsorption on the catalyst surface.Heterogeneous catalysis is used in the industrial production of various chemicals.Haber's process is one of the most common examples of heterogeneous catalysis involving the production of ammonia from nitrogen and hydrogen.$\underset{\mathrm{Nitrogen}}{{\mathrm{N}}_{2}\left(\mathrm{g}\right)}+\underset{\mathrm{Hydrogen}}{3{\mathrm{H}}_{2}\left(\mathrm{g}\right)}\stackrel{\mathrm{Fe}\left(\mathrm{s}\right)}{\to }\underset{\mathrm{Ammonia}}{2{\mathrm{NH}}_{3}\left(\mathrm{g}\right)}$

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