Chapter 13, Problem 60QP

Interpretation Introduction

Interpretation:

The partial pressures of ethanol and 1-propanol over a solution of ethanol in 1-propanol at $35°\text{C}$ are to be calculated.

Concept introduction:

Raoult’s law gives the relationship between the partial vapor pressure of a solution and the solvent. This law statesthat the partial pressure of the solvent above a solution $\left(P_1\right)$ is equivalent to the product of mole fraction of the solvent $\left({\chi }_1\right)$, and the partial pressure of the pure solvent $\left(P_1^{°}\right)$. It is expressed as follows:

$P_1={\chi }_1{P}_1^{°}$ ….. (1)

The mole fraction of the two components can be determined as follows:

${\chi }_1=1-{\chi }_2$ ….. (2)