Chapter 20, Problem 47E

Interpretation Introduction

Interpretation: The positive value of standard Gibbs free energy, shown by many oxides of nitrogen, by taking the example of $\text{NO}$ is to be explained.

Concept introduction: The expression for standard Gibbs free energy, $\Delta G°$, is,

$\Delta G°=\sum n_{\text{p}}\Delta G{°}_{\left(\text{product}\right)}-\sum n_{\text{f}}\Delta G{°}_{\left(\text{reactant}\right)}$

To determine: The explanation of the fact that many oxides of nitrogen have positive value of standard Gibbs free energy by taking the example of $\text{NO}$.