Consider the following chemical reaction: NO 2 + CO ? NO + CO 2 Assume that the
ID: 886142 • Letter: C
Question
Consider the following chemical reaction:
NO2 + CO ? NO + CO2
Assume that the reaction occurs by a one-step collision process.
What would be the expected rate law for the reaction?
The experimental rate law is rate = k[NO2]2. Could this reaction occur by a one-step collision between NO2 and CO? Explain by selecting the single best answer.
No, it does not give a rate that agrees with the actual rate law.
Yes, because it is consistent with the overall equation for the reaction.
No, it is not the same as the observed rate law.
Yes, it gives a rate that agrees with the actual rate law.
No, it does not give a rate that agrees with the actual rate law.
Explanation / Answer
For the given reaction,
NO2 + CO ---> NO + CO2
If in case the reaction would be occuring by a one-step collision mechanism. The stoichiometry of the reactant would specify the order of the reaction. That is the expected rate law would be,
rate = k[NO2][CO]
Now, since the reaction actual rate law determined experimentally is,
rate = k[NO2]^2
Which does not matches with the rate of collision reaction. This reaction will not follow the one-step collision process because,
No. it does not give a rate that agrees with the actual rate law.
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