Chapter 4, Problem 4F.9AST

Interpretation Introduction

Interpretation:

The standard entropy of vaporization of ethanol at $\text{285}\text{.0}\text{K}$ has 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 of vaporization is shown below.

$\Delta {\text{S}}_{vap}^{°}=\frac{\Delta {\text{H}}_{vap}^{°}}{{\text{T}}_b}$

The mathematical expression for the calculation of entropy for an isothermal expansion in terms of initial and final temperature is shown below.

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