# Joule-Thomson Inversion Curves for Soave-Redlich-Kwong (SRK) and Peng-Robinson (PR) Equations of State

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Throttling a real gas can sometimes result in a temperature decrease. If such is the case, the Joule–Thomson coefficient is positive. This coefficient can be written as:

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Contributed by: Housam Binous and Ahmed Bellagi (December 2016)

Open content licensed under CC BY-NC-SA

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Reference

[1] J. M. Smith, H. C. Van Ness and M. M. Abbott, *Introduction to Chemical Engineering Thermodynamics*, 7th ed., Boston: McGraw-Hill, 2005.

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