In van der Waals equation of state for a real gas, the term that accounts for the intermolecular forces is

Van der Waal equation is:

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

Where, P, V, T, n are the pressure, volume, temperature and moles of the gas respectively. ‘a’ and ‘b’ constants specific to each gas.

Pressure correction term is:

$p+\frac{a^2}{V^2}$