Chapter 10, Problem 72QP

Interpretation Introduction

Interpretation:

The percent by volume of the oxygen gas in the mixtureis to be calculated.

Concept introduction:

The mole fraction of an individual gas for acombination of gases is the ratio of the moles of the individual gas with the aggregate(total) moles of the combination.

This can be shown by:

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

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

Also, the mole fraction of an individual gas for acombination of gases can be calculated from the ratio of the partial pressure of the individual gas with the total pressure of the combination. This can be shown by:

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

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