# Talk:Virial coefficient

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## Cross virial coefficients

What about cross virial coefficients? 128.12.20.32 21:16, 20 February 2006 (UTC)

Ref on this topic: Witold Warowny, The second cross virial coefficients of gaseous mixtures, PWN - Polish Scientific Publishers, 1979--193.231.19.53 (talk) 11:04, 21 October 2013 (UTC)

Journal articles (J Chem Phys) on mixtures virial coefficients--193.231.19.53 (talk) 11:52, 7 January 2014 (UTC)

## Compressibility factor and virial coefficients - relation to intermolecular forces

from usertalk Dirac66 : Regarding the insight on intermolecular forces, some more details regarding the relation of intermolecular forces to virial coefficients would be useful. --188.26.22.131 (talk) 10:04, 17 July 2013 (UTC)

They probably would be useful, if you want to try to find the information in a textbook. Dirac66 (talk) 01:52, 18 July 2013 (UTC)
It seems that there are inconsistencies between various sources/textbooks regarding this topic.Some give the next formula for compressibility factor and others for the second virial coefficient:
${\displaystyle Z=1+2\pi {\frac {N_{A}}{V_{M}}}\int _{0}^{\infty }(1-exp({{\frac {\varphi }{kT}}))r^{2}dr}}$

or

${\displaystyle B=1+2\pi {\frac {N_{A}}{V_{M}}}\int _{0}^{\infty }(1-exp({{\frac {\varphi }{kT}}))r^{2}dr}}$

where varphi is the potential of the forces.

Which one holds?--188.26.22.131 (talk) 14:51, 19 July 2013 (UTC)

There is clearly an error in the second formula because the second virial coefficient which is usually written B2 should have dimensions of volume. The first one may be right if you have found it in reliable sources - I am not an expert in this. Dirac66 (talk) 01:29, 20 July 2013 (UTC)
Thanks for your answer. Do you happen to know some wikieditor who has an expertise in this topic?--188.26.22.131 (talk) 09:55, 23 July 2013 (UTC)
Why don't you believe the present article? It says:
${\displaystyle B_{2}=1+2\pi \int _{0}^{\infty }(1-\exp({{\frac {\varphi }{kT}}))r^{2}dr}}$
(Dimension volume)
--P.wormer (talk) 08:42, 7 January 2014 (UTC)

## Startups

I came here expecting to hear about the concept in startup methodology. Needs more non-physics! GreenReaper (talk) 20:18, 4 June 2014 (UTC)