Chapter 18, Problem 18.117SP

Interpretation Introduction

Interpretation:

The equilibrium partial pressure of iodine is to be calculated

Concept introduction:

The expression to evaluate free energy for non-standard condition is as follows:

$\Delta G°=-RT\ln K$

Where,

• $K$ represents equilibrium constant.
• $\Delta G°$ denotes standard free energy change.
• $R$ denotes gas constant.
• $T$ denotes temperature.

Rearrange to obtain the value of $K$.

$\begin{array}{c}\ln K=\frac{-\Delta G°}{RT}\\ K=e^{\frac{-\Delta G°}{RT}}\end{array}$