The experimental rate law was found to be: rate = k [NO]2[O2] for the reaction 2

Q: The experimental rate law was found to be: rate = k [NO]2[O2] for the reaction 2

a. 2 NO + O2 --------> 2 NO2 k1, rate = k1 [NO]2 [O2] The above reaction has found to be consistent with the experimental expression. And the remaining are not.

ID: 852349 • Letter: T

Question

The experimental rate law was found to be: rate = k [NO]2[O2] for the reaction

2 NO (g) + O2 (g) ? 2 NO2 (g)

The following mechanisms have been proposed for this reaction. Determine which of the mechanisms are consistent with the experimental expression and which are not by finding the rate law for each mechanism. Of those which are consistent, indicate which is more probable.

a. 2 NO + O2 ? 2 NO2 k1 rate = k1 [NO]2 [O2]

b. NO + O2 ? NO2 + O k1 slow rate = k1 [NO] [O2]

O + NO ? NO2 k2 fast

c. NO + O2 NO3 k1, k -1 both fast rate = k2K1 [NO]2 [O2] ?

NO3 + NO ? 2 NO2 k2 slow

Explanation / Answer

a. 2 NO + O2 --------> 2 NO2 k1, rate = k1 [NO]2 [O2]

The above reaction has found to be consistent with the experimental expression.

And the remaining are not.

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The experimental rate law for the reaction 2NO_2 (g) + O_3 (g) rightarrow N_2O_5

The experimentally determine rate law for the reaction AB + C rightarrow A + BC

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The experimental rate law was found to be: rate = k [NO]2[O2] for the reaction 2

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Explanation / Answer

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