Chapter 10, Problem 65QP

Interpretation Introduction

Interpretation:

The partial pressures for ${\text{O}}_2$ and ${\text{N}}_2$ in air areto be calculated.

Concept introduction:

The mole fraction of an individual gas for the combination of gases is the ratio of the moles of the individual gas to the total number of moles of the gaseous mixture.

${\chi }_i=\frac{n_i}{n_{\text{total}}}$

Here, ${\chi }_i$ is the mole fraction, $n_i$ is the mole fraction of individual gas and $n_{\text{total}}$ is the total number of moles.

Also, the mole fraction of an individual gas in the combination of gases can be calculated from the ratio of the partial pressure of the individual gas to the total pressure of the combination.

${\chi }_i=\frac{P_i}{P_{\text{total}}}$

Here, ${\chi }_i$ is the mole fraction, $P_i$ is the partial pressure of individual gas and $P_{\text{total}}$ is the total pressure.