Van der Waals equation of state

The van der Waals equation is

$\left.p={\frac {nRT}{V-nb}}-a\left({\frac {n}{V}}\right)^{2}\right.$.

where:

• $p$ is the pressure

• $V$ is the volume

• $N$ is the number of molecules

• $T$ is the absolute temperature

• $k_{B}$ is the Boltzmann constant

• $R$ is the Gas constant; $R=N_{A}k_{B}$, with $N_{A}$ being Avogadro constant