Talk:Van der Waals equation

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Is there any way we can find out the value of b theoretically if the value of radius of nucleus is known

and if there is any way of caluculating a plz do write

Yes, there is, but you will need heavy-duty quantum physics and a lot of computational power to get reasonably good answers. By the way, the atomic radius is considerably bigger than the size of the atomic nucleus. -- Karada 08:20, 1 Sep 2003 (UTC)
The van der Waals equation is really only an approximation valid at the macroscopi levels... not sure why you would want to bother using it at the subatomic level. yosofun 00:25, 7 Mar 2004 (PST)

Contents

[edit] Changed notation

I changed the notation for the formulas to the form more familiar to me of lower case p for pressure and lower case for per-particle properties. Hence v for volume per particle (specific volume), and V for total volume; N for total number of moles (or particles) rather than n which is used for the number density of molecules (number of particles per unit volume: n = 1/v = N/V, if N is the total number of particles)(or n = N x Na / V if N is the total number of moles, and where Na is Avogadro's number).

  • Tom Lougheed 2005-09-27

[edit] The equations at the top need fixing

Those equations need cleaning - first and foremost: same variables should not have different meanings. Fresheneesz 08:21, 21 November 2005 (UTC)

Looking at it quickly, the only problem I see is lowercase p and uppercase P both being used for pressure. Did you see others? PAR 13:58, 21 November 2005 (UTC)
I think I fixed it abakharev 23:19, 21 November 2005 (UTC)
Does anyone mind if we have the convention N=number of particles in the system, V=volume of the system, and v=V/N = volume per particle, without introducing the concept of the mole and Avogadro's number? I will do the changing. PAR 03:57, 22 November 2005 (UTC)
There won't be R (gas constant) then, just NkT, if it is OK with you, guys, it is OK with me abakharev 04:50, 22 November 2005 (UTC)

[edit] Error in vC

Should not kTc=8a/27b read NkTc=8a/27b ? Jhaagsma 09:25, 26 February 2007 (UTC)
No, I think the problem is that the equation for vC is wrong. I fixed it. Please check and see if you agree. Thanks for noticing the inconsistency. PAR 17:03, 26 February 2007 (UTC)

[edit] Change title of article to 'Van der Waals equation of state'

'Van der Waals equation of state' is a more accurate description of this article and so I think it should be moved. Wiki me 15:47, 18 March 2007 (UTC)

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