(a)
Interpretation:
The mechanism of the reaction of nitrogen dioxide with ozone to produce dinitrogen pentoxide has to be evaluated with the experimental results and also the intermediates have to be identified.
(a)
Explanation of Solution
Reaction of nitrogen dioxide with ozone to produce dinitrogen pentoxide is given as follows;
Overall stoichiometry:
The elementary steps have to be summed up in order to find the overall stoichiometry. This is done as shown below;
The species
This is consistent with the stoichiometry that is determined experimentally.
Rate Law:
Rate of the reaction is determined by the rate limiting step and it is the slowest step in the mechanism. Therefore, the first step is the slow step and it is the rate-limiting step. The rate law can be written as shown below considering the slow step;
Where,
The species
The fast and reversible step in the mechanism is given as follows;
The rate of formation of
The rate of formation and decomposition of
The concentration of
Thus the theoretical result is consistent with experimental data and the intermediate is
(b)
Interpretation:
The mechanism of the reaction of nitrogen dioxide with ozone to produce dinitrogen pentoxide has to be evaluated with the experimental results and also the intermediates have to be identified.
(b)
Explanation of Solution
Reaction of nitrogen dioxide with ozone to produce dinitrogen pentoxide is given as follows;
Overall stoichiometry:
The elementary steps have to be summed up in order to find the overall stoichiometry. This is done as shown below;
The species
This is consistent with the stoichiometry that is determined experimentally.
Rate Law:
Rate of the reaction is determined by the rate limiting step and it is the slowest step in the mechanism. Therefore, the first step is the slow step and it is the rate-limiting step. The rate law can be written as shown below considering the slow step;
Where,
The species
Thus this is consistent with the experimental results.
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