Skip to main content

All Questions

Filter by
Sorted by
Tagged with
0 votes
1 answer
4k views

Why is the pressure correction added in the Van der Waals equation?

Since real gas particles experience attraction to each other, that means the pressure must be less from what we would expect. So why do we have to add a term to correct it? For example, in the ...
Micelle's user avatar
  • 191
13 votes
3 answers
26k views

Why is the pressure correction in the van der Waals equation proportional to (n/V)^2?

The van der Waals equation for real gases is stated as follows: $$\left(P + \frac{an^2}{V^2}\right)(V - nb) = nRT$$ For the coefficient $b$, we can reason out that more the number of molecules, the ...
Yashas's user avatar
  • 2,146
25 votes
6 answers
1k views

Why are equations of state for a non-ideal gas so elusive?

The ideal gas equation (daresay "law") is a fascinating combination of the work of dozens of scientists over a long period of time. I encountered Van der Waals interpretation for non-ideal gases ...
jonsca's user avatar
  • 3,005