Chapter 18, Problem 18.11QP

(a)

Interpretation Introduction

Interpretation: The standard entropy change ${\text{(ΔS}}^{\text{°}}{}_{\text{reaction}}\text{)}$ in the given set of reactions has to be calculated.

Concept introduction: Entropy is the measure of randomness in the system.   Standard entropy change in a reaction is the difference in entropy of the products and reactants.  ${\text{(ΔS}}^{\text{°}}{}_{\text{reaction}}\text{)}$  can be calculated by the following equation.

$\begin{array}{l}{\text{(ΔS}}^{\text{°}}{}_{\text{reaction}}{\text{) = S}}^{\text{°}}{}_{\text{Products}}-{\text{ S}}^{\text{°}}{}_{\text{reactants}}\\ \end{array}$

Where

${\text{S}}^{\text{°}}{}_{\text{reactants}}$ is the standard entropy of the reactants

${\text{S}}^{\text{°}}{}_{\text{Products}}$ is the standard entropy of the products

(b)

Interpretation Introduction

Interpretation: The standard entropy change ${\text{(ΔS}}^{\text{°}}{}_{\text{reaction}}\text{)}$ in the given set of reactions has to be calculated.

Concept introduction: Entropy is the measure of randomness in the system.   Standard entropy change in a reaction is the difference in entropy of the products and reactants.  ${\text{(ΔS}}^{\text{°}}{}_{\text{reaction}}\text{)}$  can be calculated by the following equation.

  ${\text{(ΔS}}^{\text{°}}{}_{\text{reaction}}{\text{) = S}}^{\text{°}}{}_{\text{Products}}-{\text{ S}}^{\text{°}}{}_{\text{reactants}}$

Where

${\text{S}}^{\text{°}}{}_{\text{reactants}}$ is the standard entropy of the reactants

${\text{S}}^{\text{°}}{}_{\text{Products}}$ is the standard entropy of the products