Chapter 15, Problem 21E

Interpretation Introduction

Interpretation:

Among $\text{NO}$, ${\text{N}}_2\text{O}$ and ${\text{NO}}_2$, the oxide having the highest molar heat of vaporization is to be identified.

Concept introduction:

The molar heat of vaporization of a substance is defined as the amount of heat energy required to convert one mole of a liquid substance to its gaseous state at its boiling point.

The heat of vaporization depends on the boiling point of the liquid. The higher is the boiling point higher will be its intermolecular forces and therefore; more amount of energy will be required to vaporize it. So, the liquids having a higher boiling point will have a higher molar heat of vaporization.