The rate of a surface catalyzed reaction between CO(g) and O2(g) follows Langmuir-Hinshelwood mechanism. If O2 gets dissociated during adsorption, the rate of the reaction is
[where, p represents the partial pressure and K represents the surface binding constant on the species. k is a proportionality constant]
1
\(\rm \frac{k.K_{co}p_{co}.K_{o_2}^{1/2}p_{o_2}^{1/2}}{\left(1+K_{co}p_{co}+K_{o_2}^{1/2}p_{o_2}^{1/2}\right)^2}\)
2
\(\rm \frac{k.K_{co}p_{co}.K_{o_2}p_{o_2}}{1+K_{co}p_{co}+K_{o_2}p_{o_2}}\)
3
\(\rm \frac{k.p_{co}.K_{o_2}p_{o_2}}{1+K_{o_2}p_{o_2}}\)
4
\(\rm \frac{k.K_{co}p_{co}.K_{o_2}p_{o_2}}{(1+K_{co}p_{co}+K_{o_2}p_{o_2})^2}\)