Chapter 18.5, Problem 52LC

Interpretation Introduction

Interpretation: The explanation for a reaction being spontaneous at some conditions but non-spontaneous at other conditions are to be stated.

Concept Introduction: The degree of disorderliness or randomness in a system is called entropy. It is represented by S.

Answer to Problem 52LC

When the Gibbs free energy of a reaction is negative then the reaction is said to be spontaneous. On the other hand, when the Gibbs free energy of a reaction is positive then the reaction is said to be nonspontaneous.

Explanation of Solution

The products are favored when there is an increase in the disorderliness of the system (or entropy of the system increases) and the reaction is said to be spontaneous.

Also, when the Gibbs free energy of a reaction is negative then the reaction is said to be spontaneous. On the other hand, when the Gibbs free energy of a reaction is positive then the reaction is said to be nonspontaneous.