Lawrie Ryan and Roger Norris Solutions for Chapter: Reaction Kinetics, Exercise 16: Question

Describe in general terms what is meant by desorption.

Nickel acts as a catalyst for the hydrogenation of alkenes. For example: ${\mathrm{CH}}_2={\mathrm{CH}}_2 + {\mathrm{H}}_2 \stackrel{\mathrm{Ni} }{\to }{\mathrm{CH}}_3-{\mathrm{CH}}_3$

Suggest how nickel catalyses this reaction by referring to the processes of adsorption, reaction on the metal surface and desorption.

In catalytic converters, rhodium catalyses the reduction of nitrogen(II) oxide, $\mathrm{NO}$, to nitrogen. Draw diagrams to suggest: how $\mathrm{NO}$ is adsorbed onto the surface of the rhodium metal.

In catalytic converters, rhodium catalyses the reduction of nitrogen(II) oxide, $\mathrm{NO}$, to nitrogen. Draw diagrams to suggest: how is how nitrogen is formed.