The catalytic oxidation of ethanol has been earned out over a tantalum oxide cat

Question

The catalytic oxidation of ethanol has been earned out over a tantalum oxide catalyst [J. Catal, 25. 194 (1972)]. The overall reaction C_2H_3OH + 1/2O_2 rightarrow CH_3CHO + H_2O is believed to proceed by the following mechanism, in which ethanol is adsorbed on one type of site, S, and oxygen is adsorbed on a different type of site, S'. Ethanol undergoes dissociative adsorption on two type S sites: C_2H_5OH + 2S C_2 H_5 O S + H S Oxygen also undergoes dissociative adsorption on two type S' sites (presumably metal ions): O_2+ 2S' 2O S' Assuming that the rate-limiting step is and that the adsorbed hydroxyl may be converted into water by show that the initial rate law is What generalizations can you make after studying this problem?

Explanation / Answer

In the above problem the rate limiting step is slow step so we can write rate law for the rate determining step and also they considered partial pressures for the gases and written average rate of the reaction denpends on concentration of the reactants not on the products..so they considered the reactants concentration at determining step....

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