Chapter 20.3, Problem 20.4BFP

Interpretation Introduction

Interpretation: The value of change in standard Gibbs free energy of reaction needs to be calculated for the given reaction.

Concept Introduction:

The change in standard enthalpy and change in standard entropy of a reaction can be calculated using the change in enthalpy of formation and entropy of components respectively from the thermodynamic table (at 298 K).

These two values do not depend on T thus, the value will be the same for all the temperature values. Here, the change in standard Gibbs free energy of reaction changes with T thus, it is calculated as follows:

  $\Delta G^o=\Delta H^o-T\Delta S^o$

Here, $\Delta H^o$ is the change in standard enthalpy, $\Delta S^o$ is the change in standard entropy, and T is temperature.