Joule–Thomson effect
Videos
In thermodynamics, the Joule–Thomson effect describes the temperature change of a real gas or liquid when it is expanding, typically caused by the pressure loss from flow through a valve or porous plu
Fig. 2 – T-s diagram of nitrogen. The red dome represents the two-phase region with the low-entropy side (the saturated liquid) and the high-entropy side (the saturated gas). The black curves give the T-s relation along isobars. The pressures are indicated in bar. The blue curves are isenthalps (curves of constant specific enthalpy). The specific enthalpies are indicated in kJ/kg. The specific points a, b, etc., are treated in the main text.
Joule expansion
Videos
The Joule expansion is an irreversible process in thermodynamics in which a volume of gas is kept in one side of a thermally isolated container, with the other side of the container being evacuated. T
Joule–Thomson effect
…effect is named after James Prescott Joule and William Thomson, 1st Baron Kelvin, who discovered it in 1852. It followed upon earlier work by Joule on Joule expansion, in which a gas undergoes free expansion in a vacuum and the temperature is unchanged, if the gas is ideal. The adiabatic (no heat exchanged) expansion…
A free expansion of a gas can be achieved by moving the piston out faster than the fastest molecules in the gas.