A kinetic study is done on the following reaction:2 OF22 F2 + O2There are two proposed mechanisms.Mechanism A.Step 1.        2 OF22 F2 + O2    rate determining slow stepMechanism B.Step 1.        2 OF2O2F4    rate determining slow stepStep 2.        O2F4O2 + 2 F2    fast second stepThe observed rate law is     Rate = k [OF2]2Question: Which of the mechanisms, if any, is supported by the experimental evidence?A. Mechanism AB. Neither mechanism is consistent with the observed rate law.C. Both mechanisms are consistent with the observed rate law.D. Mechanism B

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Asked Sep 16, 2019
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A kinetic study is done on the following reaction:2 OF22 F2 + O2

There are two proposed mechanisms.

Mechanism A.
Step 1.         2 OF22 F2 + O2     rate determining slow step

Mechanism B.
Step 1.         2 OF2O2F4     rate determining slow step
Step 2.         O2F4O2 + 2 F2     fast second step

The observed rate law is     Rate = k [OF2]2

Question: Which of the mechanisms, if any, is supported by the experimental evidence?

A. Mechanism A
B. Neither mechanism is consistent with the observed rate law.
C. Both mechanisms are consistent with the observed rate law.
D. Mechanism B
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Expert Answer

Step 1

The term steady state approximation refers to an approach which is used in chemical kinetics for the derivation of the rate law for the given chemical reaction. This method is based on assumption that one of the intermediates in the reaction is consumed so quickly as soon as it is generated. Therefore, its concentration remains the same during the course of the reaction.

Step 2

The rate law expression is a mathematical expression which describes the relation between the concentration of the reactants which participate in the chemical reaction and the rate of that reaction.

Step 3

The given chemical reacti...

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20F 2F,+02

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