Chapter 18, Problem 63AP

Interpretation Introduction

Interpretation:

Trouton’s rule is to be verified using the given data and the same ratio for ethanol and water is to be calculated.

Concept introduction:

According to Trouton’s Rule, the entropy of vaporization is approximately equal to $90\text{ J/K}\text{.mol}$, for different liquids at their boiling points.

The entropy of vaporization is equal to the ratio of the molar heat of vaporization of a liquid to its boiling point temperature.

The equation is given below:

$\Delta S_{\text{vap}}=\frac{{\text{ΔH}}_{\text{vap}}}{T_{\text{bp}}}$

Here, $\Delta S_{\text{vap}}$ is the entropy of vaporization, ${\text{ΔH}}_{\text{vap}}$ is the molar heat of vaporization, and $T_{\text{bp}}$ is the boiling point temperature.