Chapter 18, Problem 89SCQ

Interpretation Introduction

Interpretation:

It should be explained that how the process can be driven by entropy when the value of enthalpy change is zero.

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,

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

The magnitude and sign of ${\text{ΔG}}^{\text{o}}$ decides if the process is product-favored and spontaneous. It should be negative for a product-favored reaction.