Chapter 4.2, Problem 6E

Interpretation Introduction

Interpretation: Boiling point of ethylene glycol exceeds that of water at $760\text{torr}$ should be explained.

Concept introduction: Raoult’s law describes the relationship between the composition of the liquid mixture and vapor pressure. This law holds good only for ideal solutions. Mathematical expression of Raoult’s law is as follows:

  $P_{\text{X}}=P_{\text{X}}^{°}{N}_{\text{X}}$

Where,

• $P_{\text{X}}$ is partial pressure of component $X$ .
• $P_{\text{X}}^{°}$ is partial pressure of pure component $X$ .
• $N_{\text{X}}$ is mole fraction of component $X$ .