Good point.
This magic filter doesn't apply any forces to the gas any more than the container walls do -- it's a Maxwell's demon-ish type filter that simply allows the passage of one type of gas particle but not the other.
For example if the two gases have molecules of different size, and the...
Imagine I have 2 constant-volume, constant-temperature containers. Container A has a volume of 10 L and one Container B has a volume of 5 L.
My hypothetical gases Ideal Gas A and Ideal Gas B have the same properties as each other (temperature, mass, energy, heat capacity, blah blah blah).
If I...