Chapter 20, Problem 6QAP

Interpretation Introduction

Interpretation:

The value of ΔG° should be obtained for the reaction in problem (4) at 200 °C.

Concept introduction:

The standard change in Gibb’s free energy is calculated by following formula:

$\Delta G^0=\Delta H^0-T\Delta S^0$

Where H is enthalpy, T is temperature and S is entropy of the reaction in standard condition.

Further, the standard change in enthalpy and entropy for reactions are obtained as:

$\begin{array}{l}{\text{ΔH}}^0\text{=}\sum {\text{ΔH}}_{\text{f(products)}}^{\text{0}}\text{-}\sum {\text{ΔH}}_{\text{f(reactants)}}^{\text{0}}\\ {\text{ΔS}}^0\text{=}\sum {\text{ΔS}}_{\text{(products)}}^{\text{0}}\text{-}\sum {\text{ΔS}}_{\text{(reactants)}}^{\text{0}}\end{array}$