Originally Posted by ricki
gas type and temp are variables, pure nitrogen should be theoretically most consistent.
O2 "permeates" approximately 3-4 times faster than does N2 through a typical rubber, as is used in tires, primarily
because O2 has a slightly smaller effective molecular size than does N2.
But the claim by rafazx10
really had nothing to do with how quickly a given gas permeates. The claim was that some gases expand faster than others with an increase in Temp. I'm pretty sure he was talking about a short term effect. I don't see anything in the ideal gas law equation that says the Pressure of one gas will be affected more by Temp than another. The bounce of a pressurized ball is due, in large part, to the internal pressure relative to the external pressure.