Question

In a gas mixture, the partial pressures are nitrogen 455 torr , oxygen 130 torr , and helium 240 torr.

What is the total pressure (torr) exerted by the gas mixture?

Answer 1

Dalton’s Law: the total pressure of a gas mixture is the sum of the partial pressure of the gases in the mixture.

$P_T = P_{nitrogen}+P_{oxygen}+P_{helium}$

$P_T = 455 \;torr + 130 \;torr + 240 \;torr = 825 \;torr$

Answer: 825 torr