Talk:Joule-Thomson effect/Draft: Difference between revisions

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imported>Milton Beychok
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imported>David E. Volk
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I reworked it somewhat in my CZ sandbox and conformed it to a CZ article format. - [[User:Milton Beychok|Milton Beychok]] 19:49, 17 February 2008 (CST)
I reworked it somewhat in my CZ sandbox and conformed it to a CZ article format. - [[User:Milton Beychok|Milton Beychok]] 19:49, 17 February 2008 (CST)
== comments ==
1) the equation for <math>\mu_{JT}</math> is written as if it is a constant.  Should this be written as <math>\mu_{JT}</math>(T,P) to reflect its dependence on the initial temperature and pressure?
2) Is there any theoretical explanation for this phenomenon, or is it typically thought of as a phenominological effect that is just measured?  In other words, does it relate to electrostatic interactions between atoms/molecules, polarizability, etc?  I haven't thought about the JT effect for quite some time (decades!), but I'll look around for a textbook or two and look for answers also.
[[User:David E. Volk|David E. Volk]] 15:49, 11 July 2009 (UTC)

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 Definition The increase or decrease in the temperature of a real gas (as differentiated from an ideal gas) when it is allowed to expand freely at constant enthalpy (meaning that no heat is transferred to or from the gas, and no external work is extracted from the gas). [d] [e]
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I reworked it somewhat in my CZ sandbox and conformed it to a CZ article format. - Milton Beychok 19:49, 17 February 2008 (CST)

comments

1) the equation for is written as if it is a constant. Should this be written as (T,P) to reflect its dependence on the initial temperature and pressure?

2) Is there any theoretical explanation for this phenomenon, or is it typically thought of as a phenominological effect that is just measured? In other words, does it relate to electrostatic interactions between atoms/molecules, polarizability, etc? I haven't thought about the JT effect for quite some time (decades!), but I'll look around for a textbook or two and look for answers also. David E. Volk 15:49, 11 July 2009 (UTC)