Chapter 4, Problem 4.16P

Interpretation Introduction

Interpretation:

The Henry’s law constants have to be determined and also have to confirm that the mixture conforms to Raoult’s law for the component in large excess and to Henry’s law for the minor component.

Concept introduction:

Raoult’s law: The vapor pressure of the solvent over the solution ${\text{P}}_{\text{solvent}}$ is proportional to the mole fraction of the solvent. The ideal solution obeys the Raoult’s law.

$\begin{array}{l}{\text{P}}_{solvent}\text{= }{\chi }_{solvent}{\text{P}}_{solvent}^{\circ }\text{,}\\ \text{where,}{\text{P}}_{solvent}\text{is}\text{the}\text{vapor pressure of the solvent over the solution,}\\ {\chi }_{solvent}\text{is mole fraction of solvent in solution, }\\ {\text{P}}_{solvent}^{\circ }\text{ is the vapor pressure of the pure solvent}\text{.}\end{array}$

Henry’s law states that the partial pressure of the gas in vapor phase (p) is proportional to the mole fraction of the gas (x) in the solution.

$\text{p}\text{=}{\text{K}}_{\text{H}}\text{x}\boxed{\begin{array}{l}\text{where,}\\ {\text{K}}_{\text{H}}\text{:}\text{Henry's}\text{constant}\\ \text{x}\text{:}\text{mole}\text{fraction}\\ \text{p}\text{:}\text{partial}\text{pressure}\end{array}}$