Chapter 4, Problem 4I.7E

(a)

Interpretation Introduction

Interpretation:

Change in entropy of surroundings and system for vaporization of $1.00\text{mol}$ ${\text{CH}}_4\left(\text{l}\right)$ at its boiling point has to be determined.

Concept Introduction:

Entropy change measure and evaluates the heat transfer occurring in any specific substance or any reaction. This change is governed by the enthalpy change relative to particular temperature. Phases and their respective transformations also affect the entropy change.

(b)

Interpretation Introduction

Interpretation:

Change in entropy of surroundings and system for melting of $1.00\text{mol}$ ${\text{C}}_2{\text{H}}_5\text{OH}\left(\text{s}\right)$ at its melting point has to be determined.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

Change in entropy of surroundings and system for freezing of $1.00\text{mol}$ ${\text{C}}_2{\text{H}}_5\text{OH}\left(\text{l}\right)$ at its freezing point has to be determined.

Concept Introduction:

Refer to part (a).