Chapter 6, Problem 6.7NP

Interpretation Introduction

Interpretation : The value of $\Delta G_m$ should be compared for the processes $(\text{C, solid, graphite, 1 bar, 298}\text{.15 K) }\to \text{ (C, solid, graphite, 325 bar, 298}\text{.15 K)}$ and $(\text{He, g, 1 bar, 298}\text{.15 K) }\to \text{ (He, g, 325 bar, 298}\text{.15 K)}$ .

Concept Introduction :

The change in Gibbs free energy can be calculated as follows:

  $\Delta G={\displaystyle \underset{P_i}{\overset{P_f}{\int }}V.dP=V(P_f-P_i)}$

Here,

  $\begin{array}{l}\Delta G\text{ - Gibbs free energy}\\ V\text{ - volume}\\ P_i\text{ - initial pressure}\\ P_f\text{ - final pressure}\end{array}$