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Chapter 6: Problem 6.20 (page 233)

Draw an energy diagram for a two-step reaction, A→B→C, where the relative energy of these compounds is C<A<B, and the conversion of B→Cis rate-determining.

Short Answer

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Answer

The energy diagram is as follows:

Step by step solution

01

Step-by-Step SolutionStep 1: Energy diagram

An energy diagram (energy vs. reaction coordinate) is used to describe the change in energy of a system during the conversion of the reactants to the products.

02

Rate determining step

The step (in a chemical reaction) that takes the maximum time in the conversion of the reactants to products is termed the rate-determining step.

The rate-determining step has the maximum activation energy barrier.

03

Energy diagram of the given reaction

The reaction involves the transformation of the reactant A to product C through an intermediate B.

Species C has the lowest energy, and B has the highest energy.

Since it is given that the conversion of B to C is the rate-determining step, the activation energy barrier between B and C will be the maximum.

Energy diagram of a two-step reaction

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Most popular questions from this chapter

Question: Draw an energy diagram for a reaction in which the products are higher in energy than the starting materials and Eais large. Clearly label all of the following on the diagram: the axes, the starting materials, the products, the transition state, ∆H°,and Ea.

Write a rate equation for each reaction, given the indicated mechanism.

a.

b.

The following is a concerted, bimolecular reaction:CH3+NaCN→CH3CN+NaBr.

a. What is the rate equation for this reaction?

b. What happens to the rate of the reaction if[CH3Br] is doubled?

c. What happens to the rate of the reaction if [NaCN] is halved?

d. What happens to the rate of the reaction if [CH3Br] and [NaCN] are both increased by a factor of five?

Which bond in each pair has the higher bond dissociation energy?

a.

b.

Question: Classify the conversion of A to B as a substitution, elimination, or addition. B can be converted to the female sex hormone estrone in two steps.
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