Chapter 18, Problem 18.90AP

(a)

Interpretation Introduction

Interpretation: The sign of $\Delta S_{\text{rxn}}^{\text{ο}}$ for the given reactions are to be predicted. The values of $\Delta S^{\text{ο}}$ for the given reactions are to be calculated. Whether calculations support the prediction is to be stated.

Concept introduction: The standard molar entropy of a substance is the entropy of one mole of a compound in its standard state. Precipitation reactions are those which involve removal of ions from aqueous solution and their deposit as solid salts.

To determine: The sign of $\Delta S_{\text{rxn}}^{\text{ο}}$ for the given reactions.

(b)

Interpretation Introduction

To determine: The values of change in entropy, $\Delta S_{\text{rxn}}^{\text{ο}}$ for the given reactions.

(c)

Interpretation Introduction

To determine: If the calculations support the prediction stated in part(a).