Chapter 13.6, Problem 13.7BFP

Interpretation Introduction

Interpretation:

The vapor pressure of ethanol is to be determined.

Concept introduction:

Raoult’s law states that the partial pressure of each component of an ideal mixture is calculated by the multiplication of the vapor pressure of the pure component and its mole fraction in the mixture. It is not valid for a volatile solute.

According to Raoult’s law, the vapor pressure of the solvent is given as follows:

$P_{\text{solvent}}=X_{\text{solvent}}{P}_{\text{solvent}}^{°}$ (1)

Here,

$P_{\text{solvent}}$ is the vapor pressure of the solvent.

$X_{\text{solvent}}$ is the mole fraction of the solvent.

$P_{\text{solvent}}^{°}$ is the vapor pressure of the pure solvent.