All of the following are part of the collision theory of rates expect a. species

Question

All of the following are part of the collision theory of rates expect a. species must collide in order to react b. Two species must collide with sufficient energy to either break or rearrange bonds c. Molecules must collide in a preferred relative orientation d. None of the above 11. For the reaction mechanism below identify the rate law, the molecule that acts as intermediate, and the catalyst if any: 2 SO_2(g) + 2 NO_2(g) rightarrow 2 SO_3(g) + 2 NO(g) 2NO (g) + O_2 rightarrow 2 NO_2 (g) a. Rate=k[NO_2], NO_2 and SO_2 b. Rate=k[NO][O_2], SO_2 and NO_2 c. Rate=k[SO_2][O_2], O_2 and SO_3 d. Rate=k[SO_2][NO_2], NO, and NO_2

Explanation / Answer

(d) Rate depends on the slowest step so the 1st step is teh slowest thus the rate of reaction will only depend on the conc. of reactants of the 1st step

thus,

Rate = K [SO2][NO2]

and also we can see that NO is consumed as soon as it forms , indicating it's nature in not stable thus it acts as the intermediate for the reaction.

also NO2 is getting formed again in the last fast step, thus NO2 is behaving as catalyst .

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