Chapter 18, Problem 18.102AP

(a)

Interpretation Introduction

Interpretation: The idea that suggests $\Delta H_{\text{vap}}^{\text{ο}}/T_{\text{b}}$ for a range of liquids should be approximately constant is to be stated. The liquids which deviate from Trouton’s rule are to be identified with an explanation.

Concept introduction: Trouton’s rule is the relationship between enthalpy of vaporization and the boiling point. It shows that the ratio $\Delta H_{\text{vap}}^{\text{ο}}/T_{\text{b}}$ for a liquid is approximately $88\text{J/mol}\text{.K}$.

To determine: The idea that suggests $\Delta H_{\text{vap}}^{\text{ο}}/T_{\text{b}}$ for a range of liquids should be approximately constant.

(b)

Interpretation Introduction

To determine: The liquids which deviate from Trouton’s rule with an explanation.