A possible mechanism for the overall reaction is found below: (recall to chapter

Question

A possible mechanism for the overall reaction is found below: (recall to chapter 13) Br2 (g) + 2 NO (g) 2 NOBr (g) Step 1 (fast) NO (g) + Br2 (g) NOBr2 (g) Step 2 (slow) NOBr2 (g) + NO (g) 2 NOBr (g) Answer following questions: The rate law based on this mechanism is? What is molecularity of the first step in the mechanism? How many intermediates are involved in the mechanism? Does reaction include catalyst? Explain your answer. Give the definition for the intermediate. Give the definition for the molecularity of the elementary step. Which step is rate determining in this mechanism? Give the definition for the rate determining step.

Explanation / Answer

a) The rate of the complex reaction depends on the slowest step of the reaction.Therefore,

rate of reaction = k*[NOBr2]*[NO]

b) Molecularity of the first step = 3

c) Intermsediates involved is one which is NOBr2

d) The reaction doesnot involve catalyst

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