Classical thermodynamics, heat transfer Thermodynamic potentials and relations Concept
Joule–Thomson effect
Summary
The Joule–Thomson effect is the temperature change of a real gas or liquid forced through a valve or porous plug to lower pressure. No heat is exchanged with the surroundings. Such a throttling process keeps the enthalpy constant. The rate of change of temperature with pressure is the Joule–Thomson coefficient. For an ideal gas it is zero, and for real gases it can have either sign. The effect is the basis of gas liquefaction and of many refrigerators.
Further reading
About this page
| Tag | WABJJAQ3WV |
|---|---|
| URI | m2://WABJJAQ3WV |
| Kind | concept |
| Writing | W0 stub |
| MSC | 80A10, 76N15 |
| Same as | |
| Changed | 3 November 2026 |
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