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Unformatted text preview: Different phase from reactants: heterogeneous Multi-Step Reaction Profiles . Rate of reaction determined by activation energy, E o (and frequency factor, A) . For multiple step reaction: t"(Step 1) E"(Step 2) E"(Step 3) p,alwt AE 'i6 c o o (L ffi' Reaction coordinate To increase overall rate =+ Change:- Conditions- OR Mechanism Reaclion progre$ Heterogeneous Gatalys is Hydrogenation of Ethylene O Adsorption of reactants O Migration/diffi.rsion of surface-adsorbed reactants ) Reaction on the surface O Desorption of products Examples: Catalytic converter CO+NO tvletaloxids.Pt.Pd CO, +N, Haber process Nr+3Hr-3!@lg5 2NH,...
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- Fall '10