Chapter 3, Problem 3C.2AE

(a)

Interpretation Introduction

Interpretation: The standard entropy of the given reaction at $298\text{K}$ has to be predicted.

Concept introduction: Standard entropy of the reaction increases as the numbers of gaseous constituents in the reaction increases.  Standard entropy of reaction predicts the feasibility of the reaction.  For a reaction to be feasible, the change in the standard entropy of the reaction must be positive.  The enthalpy of formation for substances in their free state is zero.

(b)

Interpretation Introduction

Interpretation: The standard entropy of the given reaction at $298\text{K}$ has to be predicted.

Concept introduction: Standard entropy of the reaction increases as the numbers of gaseous constituents in the reaction increases.  Standard entropy of reaction predicts the feasibility of the reaction.  For a reaction to be feasible, the change in the standard entropy of the reaction must be positive.  The enthalpy of formation for substances in their free state is zero.

(c)

Interpretation Introduction

Interpretation: The standard entropy of the given reaction at $298\text{K}$ has to be predicted.

Concept introduction: Standard entropy of the reaction increases as the numbers of gaseous constituents in the reaction increases.  Standard entropy of reaction predicts the feasibility of the reaction.  For a reaction to be feasible, the change in the standard entropy of the reaction must be positive.  The enthalpy of formation for substances in their free state is zero.