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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Determine if each of the following statements is true or false.

  1. (a) For a reaction that can yield more than one product, the most stable product is always formed in the greatest amount.
  2. (b) For a reaction that can yield more than one product, the pathway that has the lowest activation energy always occurs more quickly.
  3. (c) Reactions that are thermodynamically favoured are always fast.
  4. (d) Diamond is always more stable than graphite.

Interpretation Introduction

Interpretation:

It should be predicted that the given statements are true or false.

Concept introduction:

A system is said to be stable when it is in the lowest energy state. A product can be thermodynamically stable or kinetically labile or both. In general, the product that have lowest activation energy is formed easily. However, the speed of the reaction is predicted by kinetics. Thus, thermodynamics and kinetic are interrelated but are not the same.

Explanation

Reason for the true statement

Activation energy is the energy barrier that is needed to be crossed for a chemical reaction to occur. A pathway that has the lowest energy barrier will lead to the formation of product more quickly than from those that has high activation energy. Thus, the true statement is option b.

Reason for the false statement

It is not necessary that the more stable product is always formed in greater amount. The stability of a product has nothing to do with the amount forming during the course of reaction. Thus, the given option a is false...

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