Chapter 5, Problem 84E

Interpretation Introduction

Interpretation: The partial pressure of each gas and total pressure of mixture in the given mixture of ${\text{H}}_2$ and helium gases are needed to be determined where the mixture contains 1g of ${\text{H}}_{\text{2}}$ and 1g of $\text{He}$.

Concept introduction:

• Partial pressure of a gas in a mixture of gases is the pressure of that gas when it alone.

Partial pressure of a gas, according to ideal gas equation,

$\text{Pressure}\text{=}\frac{\text{Number}\text{of}\text{moles}\times \text{R}\text{×}\text{Temperature}}{\text{Volume}}$

• Number of moles of a substance from its given mass is,

$\text{Number of moles}\text{=}\frac{\text{Given}\text{mass}}{\text{Molecular}\text{mass}}$

• Total pressure of a mixture of gases is the sum of individual partial pressures of constituted gases.