A solid catalysed gaseous reaction (ideal gas) takes the following form, A + B C Sketch the curves of the initial rate (rate at zero conversion) versus the total pressure for the following cases: a) The mechanism is the reaction between adsorbed A and adsorbed B molecules on the catalyst. The controlling step is the surface reaction. b) The mechanism is the same as (a), but adsorption of A is controlling. c) The mechanism is the same as (b), but desorption of C is controlling. Assume that the overall equilibrium constants are large with respect to the adsorption equilibrium constants. d) The mechanism is a reaction between adsorbed A and B in the gas phase. The controlling step is the surface reaction. Note: For each case consider that the reactants are present in an equimolal mixture.