container of gas...

Question

A 22.4 L container at 298 K contains 50% He, 30% Ne, and 20% Ar. What is the partial pressure of each gas if the total pressure of the container is 1.00 atm?

Answer 1

Ptotal = P_He + P_Ne + P_Ar

Total pressure = sum of the partial pressures of all gases present.

Partial pressure = mole fraction x total pressure, and since total pressure is 1.00 atm, the partial pressure of each gas is 1.00 atm x the mole fraction of each gas, or in this case, the % of each gas.

Partial pressure He = 0.50 x 1.00 atm = 0.500 atm

Partial pressure Ne = 0.30 x 1.00 atm = 0.300 atm

Partial pressure Ar = 0.20 x 1.00 atm = 0.200 atm