Organic Chemistry
Organic Chemistry
7th Edition
ISBN: 9780321918765
Author: Bruice
Publisher: PEARSON EDUCATION (COLLEGE)
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Textbook Question
Chapter 23, Problem 1P

Which of the following parameters would be different for a reaction carried out in the presence of a catalyst, compared with the same reaction carried out in the absence of a catalyst? (Hint: See Section 5.13.)

ΔG°, ΔH°, Ea, ΔSz, ΔH°, Keq. ΔGz, ΔS°, Krate

Expert Solution & Answer
Check Mark
Interpretation Introduction

Interpretation: The parameters those are different for a reaction taking place in the presence of a catalyst compared with the same reaction taking place in the absence of a catalyst has to be identified.

Concept introduction:

Catalyst: Substance which helps in increasing the rate of a particular reaction without getting consumed in the reaction. It does not get consumed or changed by the reaction. It provides a different pathway where the transition state is more stable and with shorter energy hill.

Explanation of Solution

Catalyst provides a different pathway where the transition state is more stable and with shorter energy hill.  Energy difference of the rate-determining step taking place between the reactant and transition state is reduced by a catalyst and increases the rate of the reaction.  Hence the height of energy hill is decreased in this step.  The parameters that depend on the energy difference of the rate-determining step taking place between the reactant and transition state differ while the reaction occurs in presence of a catalyst.  Therefore, the parameters those are different for a reaction taking place in the presence of a catalyst compared with the same reaction taking place in the absence of a catalyst are ΔH,Ea,ΔS,ΔG,krate.  The other parameters are not affected by the energy difference of the rate-determining step taking place between the reactant and transition state.

Conclusion

The parameters those are different for a reaction taking place in the presence of a catalyst compared with the same reaction taking place in the absence of a catalyst were identified as ΔH,Ea,ΔS,ΔG,krate.

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Chapter 23 Solutions

Organic Chemistry

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