Chapter 18.6, Problem 18.4CYU

Interpretation Introduction

Interpretation:

The standard free energy change for the formation of methane should be calculated using ${\text{Δ}}_{\text{r}}{\text{H}}^{\text{o}}and{S}^{\circ }$ values.

Concept introduction:

The Gibbs free energy or the free energy change is a thermodynamic quantity represented by ${\text{ΔG}}^{\text{o}}$. It is related to entropy and entropy by the following expression,

  ${\text{ΔG}}^{\text{o}}{\text{= ΔH}}^{\text{o}}{\text{-TΔS}}^{\text{o}}$

Here, ${\text{ΔH}}^{\text{o}}$ is the change in enthalpy, ${\text{ΔS}}^{\text{o}}$ is the change in entropy and $T$ is the temperature.