Chapter 6.6, Problem 28P

Interpretation Introduction

Interpretation:

The change in Helmholtz energy for the process has to be determined.

Concept introduction:

The expression for the fundamental property relation of molar Helmholtz energy $\left(\underset{\_}{A}\right)$

$d\underset{\_}{A}=-Pd\underset{\_}{V}-\underset{\_}{S}dT$

Here, pressure is P, change in the temperature is dT, change in molar volume is $\underset{\_}{V}$, and molar entropy is $\underset{\_}{S}$.

The expansion rule

${\left(\frac{\partial X}{\partial Y}\right)}_Z={\left(\frac{\partial X}{\partial K}\right)}_L{\left(\frac{\partial K}{\partial Y}\right)}_Z+{\left(\frac{\partial X}{\partial L}\right)}_K{\left(\frac{\partial L}{\partial Y}\right)}_Z$