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## Inversion temperatureThe ## Additional recommended knowledge## TheoryThe Joule-Thomson effect cannot be described in the theory of ideal gases, in which interactions between particles are ignored. Instead, one must use a theory that accounts for the Van der Waals force between interacting particles that becomes much stronger as a gas becomes a liquid. For a van der Waals gas we can calculate the enthalpy , where From this equation, we note that if we keep enthalpy constant and increase volume, temperature must change depending on the sign of , where ## See also- critical point
- phase transition
## References**^**Charles Kittel and Herbert Kroemer (1980).*Thermal Physics*, 2nd Edition, W.H. Freeman.__ISBN 0-7167-1088-9__.
Categories: Thermodynamics | Chemical engineering |

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Inversion_temperature". A list of authors is available in Wikipedia. |