It is sometimes ‘‘proved’’ by simple physical arguments that real gases get cooler when experiencing a free expansion. These arguments are in some way incorrect since the result is in contradiction with experiment, at least for some gases. We show how these arguments can be corrected and find that there is an ‘‘inversion temperature’’ for all real gases. Values of the inversion temperature can be easily estimated and are compared with experiments.
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September 01 1993
Free expansion for real gases
Jacques‐Olivier Goussard, Bernard Roulet; Free expansion for real gases. Am. J. Phys. 1 September 1993; 61 (9): 845–848. https://doi.org/10.1119/1.17417
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