
(a)
Interpretation:
The rate law for the reaction between A and B according to the given mechanism has to be written.
(a)

Explanation of Solution
The
Rate
Where,
(b)
Interpretation:
The rate law for the case where the partial pressure of the reactants is low has to be found out.
(b)

Explanation of Solution
The rate of the reaction or the rate law is given by
Rate
Consider the case where the partial pressure of the reactants that is here, A and B are low.
So,
Rate
Where,
This implies that first order in both the reactants. Hence, the overall order is 2.
(c)
Interpretation:
The given mechanism could ever account for zeroth order kinetics has to be determined.
(c)

Explanation of Solution
The rate of the reaction or the rate law is given by
Rate
Consider the case of mixed pressure.
So,
Consider
Rate
This implies that first order in A and negative first order in B. Hence, the overall order is zero.
Yes, this mechanism can account for zeroth order kinetics in the case of mixed pressure condition.
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Chapter 19 Solutions
Atkins' Physical Chemistry
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