Thu May 30 06:04:46 GMT 2013
the permeable membrane, that the pressure difference across a
practical membrane determines not only the rate of flow of the
desired material, but also the leakage of the undesired.
I suspect that this is due to some molecules such as H2O would only
get "stuck" in the membrane if it's able to discriminate between the
"diameter" of O and N in their respective gases. When sufficient
pressure is applied, the weak repulsive forces between molecules of
the gas and membrane can be overcome to some degree and the
effective diameter reduces.
/"\ Bernd Felsche - Innovative Reckoning, Perth, Western Australia
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