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# Partial pressure

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A 400 L container at temperature of 4 celsius initially contains 0.25 mol He gas. Molecular hydrogen, which is a gas at 4 celsius is added until total pressure is 9.38*10^-2 atm. What is the partial pressure of the molecular hydrogen in the container?

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The solution calculates partial pressure.

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Note
* denotes multiplication
^ denotes power

Volume=V= 400 L
No of moles=n= 0.25 mol
Temperature= T= 4 C= 277.15 K =273.15+4

Ideal gas Law is PV=nRT
or P=nRT/V
R= Gas constant= 0.082058 L.atm.mol ^-1K ^-1
Therefore
P=Pressure= 0.0142140 atm =(0.25*0.082058*277.15)/400

Thus the calculation of pressure of Helium is correct

In a mixture of two ...

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