Chapter 4, Problem 4F.7E

(a)

Interpretation Introduction

Interpretation:

The change in the entropy of an ideal gas at constant pressurehas to be determined.

Concept Introduction:

The degree of randomness in a system is the measured in terms of entropy.  Higher the entropy greater will be the disorder in the system.  The mathematical expression for the calculation of entropy for an isothermal expansion in terms of initial and final temperature is shown below.

$\Delta \text{S}=\text{C}\text{ln}\left(\frac{{\text{T}}_2}{{\text{T}}_1}\right)$

(b)

Interpretation Introduction

Interpretation:

The change in the entropy of an ideal gas at constant volume has to be determined. 

Concept Introduction:

Same as part (a).