PROBLEM 73P

A gas mixture contains each gas at the indicated partial pressure.

N2 |
217 torr |

O2 |
106 torr |

He |
248 torr |

What is the total pressure of the mixture?

Solution 73P

Step 1:

The total pressure is 216 + 101 + 113 = 430 Torr.

The fraction represented by the N2 is 216/430 = 0.502;

the fraction for O2 is 101/430 = 0.235;

the fraction for He is 113/430 = 0.263.

Step 2:

Convert the total pressure to atmospheres:

(430 Torr)(0.00132 atm/Torr) = 0.568 atm.