Chapter 9, Problem 9.125SP

Interpretation Introduction

Interpretation:

The possibility of non-spontaneity of an exothermic reaction needs to be explained.

Concept introduction:

The Gibb’s free energy of a system is a thermochemical property of a system that indicates the energy that can be used to do work. The change in Gibb’s free energy is represented as $\text{ΔG}$. It is used in terms of Gibb’s equation to calculate other terms of a system. For any reaction the $\text{ΔH}$ and $\text{ΔS}$ can be calculated with the help of the following relation:

$\begin{array}{l}\text{ΔrS°= }\Sigma \text{ΔrS°product - }\sum \text{ΔrS°reactant}\\ \text{ΔrH°= }\Sigma \text{ΔrH°product - }\sum \text{ΔrH°reactant}\end{array}$