Joule-Thomson Effect: Inversion Temperatures & References

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In summary, the conversation is about finding references and resources for inversion temperatures for specific molecules. Some suggested sources include International Critical Tables, JANAF Tables, Hirschfelder, Curtis, and Byrd, Lewis & Randall, Klotz, and Rowlinson. There are also software packages available, such as TRAPP, SuperTRAPP (NIST), and ASPEN, but the latter may be difficult to access due to its high cost. It is mentioned that such temperatures may only be known for lighter molecules like hydrogen and helium, and that HC&B may offer insights on predicting them. Other potential sources include refrigeration/HVAC and cryogenic handbooks in engineering libraries.
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Lonewolf
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Does anybody have any decent references for this, or a table with inversion temperatures for specific molecules?
 
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International Critical Tables, JANAF Tables; you might browse Hirschfelder, Curtis, and Byrd, Lewis & Randall, Klotz, or Rowlinson; software packages in the public domain --- TRAPP, SuperTRAPP (NIST), and commercial, ASPEN (probably under a different name --- it gets bought and sold on about 6mo. cycle --- is big bucks expensive).

Inversion temps? I ain't sure anyone's found such for anything heavier than hydrogen and helium (gotta suspect such has been pinned down for neon, and maybe argon). HC&B should give you hints on the calculations for predicting such.

Other sources to try are refrigeration/HVAC and cryogenic handbooks in the engineering sections of your nearest "full service" library.
 
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There are several reliable sources that provide information on the Joule-Thomson effect and inversion temperatures for specific molecules. One recommended reference is the book "Thermodynamics: An Engineering Approach" by Cengel and Boles, which includes a detailed explanation of the Joule-Thomson effect and tables with inversion temperatures for various gases. Additionally, the National Institute of Standards and Technology (NIST) website offers a comprehensive database of thermophysical properties, including inversion temperatures for a wide range of molecules. Other reputable sources include academic journals such as the Journal of Chemical and Engineering Data and the Journal of Physical Chemistry. Overall, it is important to consult multiple sources and verify the accuracy of the information when researching the Joule-Thomson effect and inversion temperatures for specific molecules.
 

FAQ: Joule-Thomson Effect: Inversion Temperatures & References

What is the Joule-Thomson Effect?

The Joule-Thomson Effect, also known as the Joule-Kelvin Effect, is the phenomenon where a gas experiences a temperature change when it is allowed to expand or contract without any external work being done on it.

What is an inversion temperature in relation to the Joule-Thomson Effect?

An inversion temperature is the temperature at which a gas experiences no temperature change during the Joule-Thomson process. This means that the expansion or contraction of the gas does not result in a cooling or heating effect.

How is the Joule-Thomson Effect used in industry?

The Joule-Thomson Effect is used in industries such as natural gas processing and refrigeration. In natural gas processing, the effect is used to separate different components of the gas by controlling the temperature and pressure. In refrigeration, the effect is used to cool gases by expanding them and then compressing them back to their original pressure.

What factors affect the inversion temperature of a gas?

The inversion temperature of a gas is affected by its initial temperature, pressure, and the type of gas. Generally, higher initial pressures and lower initial temperatures result in lower inversion temperatures. The type of gas also plays a role, as gases with stronger intermolecular forces and lower molecular masses tend to have lower inversion temperatures.

What are some references for further reading on the Joule-Thomson Effect and inversion temperatures?

Some references for further reading on the Joule-Thomson Effect and inversion temperatures include scientific journals, textbooks on thermodynamics and gas dynamics, and online resources from reputable sources such as universities and government agencies. Some specific sources include "Thermodynamics: An Engineering Approach" by Cengel and Boles, and articles from the American Institute of Physics and the National Institute of Standards and Technology.

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