Chapter 18, Problem 110AP

Interpretation Introduction

Interpretation:

The equilibrium pressure constant for the given reaction is to be determined and the given reaction is not a major cause for ozone depletionis also to be determined.

Concept introduction:

All the energy available with the system, utilized in doing useful work, is called Gibbs free energy.

The standard free energy of formation is the free energy change that occurs when one mole of the compound is combined from its constituent elements, each in standard state.

The standard free energy change for the reaction is calculated using the following expression:

$\Delta G_{\text{rxn}}^{\text{o}}={\displaystyle \sum n}\Delta G_f^{\text{o}}\left(\text{product}\right)-{\displaystyle \sum m\Delta G_f^{\text{o}}}\left(\text{reactant}\right).$

The equilibrium pressure constant is calculated using the following expression:

$\Delta G^{\text{o}}=-\text{R}T\ln {\text{K}}_{\text{p}}$.