Chapter 18.7, Problem 2RC

Interpretation Introduction

Interpretation: the value of ${\Delta }_{r}G$ will be identified by using values of ${\Delta }_f{G}^{\circ }$ in the reaction from the given options.

Concept introduction:

${\Delta }_{r}G$ is the change in entropy at standard condition and it is calculated by sum of the product of stoichiometric coefficients and molar free energies of products minus sum of the product of stoichiometric coefficients and molar free energies of reactants. That is,

${\Delta }_r{G}^{\circ }=\sum n{\Delta }_f{G}^{\circ }(products)-\sum n{\Delta }_f{G}^{\circ }(reac\text{tants)}$