In the Joule-Thomson experiment a constant flow of gas was maintained along a tube which was divided into two compartments separated by a porous plug, such that the pressure and molar volume on the up...In the Joule-Thomson experiment a constant flow of gas was maintained along a tube which was divided into two compartments separated by a porous plug, such that the pressure and molar volume on the upstream side were P 1 , V 1 , and the pressure and molar volume on the downstream side were P 2 , V 2 . Under such circumstances the net work done on a mole of gas in passing from one compartment to the other is P 1 V 1 − P 2 V 2 . (Imagine, for example, that a piston pushes a mole of gas towards th…
