Chapter 3, Problem 3C.3AE

Interpretation Introduction

Interpretation: The standard entropy of reaction when $1\text{mol}$ ${\text{NH}}_{\text{3}}\left(\text{g}\right)$ is formed at $298\text{K}$ from its elements has to be calculated.

Concept introduction: Standard entropy of the reaction increases as the numbers of gaseous constituents are present 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.