Chapter 8.8, Problem 8.61QAP

Interpretation Introduction

Interpretation:

The total pressure exerted by the gas mixture in units of torr needs to be calculated.

Concept introduction:

► In a mixture containing two or more gases, each gas exerts its own pressure within the volume occupied by the mixture. This is termed as the partial pressure of that particular gas.

► Total pressure is the sum of partial pressures.

► Pressure of a gas is usually expressed in units such as atm, torr or mmHg

Given:

Partial pressure of nitrogen, oxygen and helium are:

$\begin{array}{l}{\text{P}}_{{\text{N}}_{\text{2}}}\text{ = 425 torr}\\ {\text{P}}_{{\text{O}}_{\text{2}}}\text{ = 115 torr}\\ {\text{P}}_{\text{He}}\text{ = 225 torr}\end{array}$