Joule-Thomson effect: Difference between revisions
Jump to navigation
Jump to search
Carl McBride (talk | contribs) No edit summary |
|||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
The '''Joule-Thomson effect''' is also known as the ''Joule-Kelvin effect''. | The '''Joule-Thomson effect''' is also known as the ''Joule-Kelvin effect''. This effect is present in non ideal gasses, where a change in temperature occurs upon expansion. | ||
==Joule-Thomson coefficient== | ==Joule-Thomson coefficient== | ||
The Joule-Thomson coefficient is given by | The Joule-Thomson coefficient is given by | ||
| Line 18: | Line 18: | ||
In terms of the [[second virial coefficient]] at zero [[pressure]] one has | In terms of the [[second virial coefficient]] at zero [[pressure]] one has | ||
:<math>\mu_{\mathrm JT}\vert_{p=0} = ^0\!\!\phi = B_2 -T \frac{dB_2}{dT}</math> | :<math>\mu_{\mathrm JT}\vert_{p=0} = ^0\!\!\phi = B_2(T) -T \frac{dB_2(T)}{dT}</math> | ||
==Inversion temperature== | |||
<ref>[http://dx.doi.org/10.1119/1.17417 Jacques-Olivier Goussard and Bernard Roulet "Free expansion for real gases", American Journal of Physics '''61''' pp. 845-848 (1993)]</ref> | |||
<ref>[http://dx.doi.org/10.2174/1874396X00903010017 E. Albarran-Zavala, B. A. Espinoza-Elizarraraz, F. Angulo-Brown "Joule Inversion Temperatures for Some Simple Real Gases", The Open Thermodynamics Journal '''3''' pp. 17-22 (2009)]</ref> | |||
==References== | ==References== | ||
<references/> | |||
'''Related reading''' | |||
*[http://jchemed.chem.wisc.edu/Journal/Issues/1981/Aug/jceSubscriber/JCE1981p0620.pdf Thomas R. Rybolt "A virial treatment of the Joule and Joule-Thomson coefficients", Journal of Chemical Education '''58''' pp. 620-624 (1981)] | |||
[[category: classical thermodynamics]] | [[category: classical thermodynamics]] | ||
[[category: statistical mechanics]] | [[category: statistical mechanics]] | ||
Latest revision as of 15:22, 20 October 2009
The Joule-Thomson effect is also known as the Joule-Kelvin effect. This effect is present in non ideal gasses, where a change in temperature occurs upon expansion.
Joule-Thomson coefficient[edit]
The Joule-Thomson coefficient is given by
where T is the temperature, p is the pressure and H is the enthalpy.
In terms of heat capacities one has
and
In terms of the second virial coefficient at zero pressure one has
Inversion temperature[edit]
References[edit]
- ↑ Jacques-Olivier Goussard and Bernard Roulet "Free expansion for real gases", American Journal of Physics 61 pp. 845-848 (1993)
- ↑ E. Albarran-Zavala, B. A. Espinoza-Elizarraraz, F. Angulo-Brown "Joule Inversion Temperatures for Some Simple Real Gases", The Open Thermodynamics Journal 3 pp. 17-22 (2009)
Related reading