Give the comparison of work of expansion of an ideal Gas and a van der Waals Gas.

We know that for an ideal gas, work done w is given as:
W_ideal = -nRT ln (V₂/ V₁)
And for a a van der Waals Gas, work done is given as:

Hence for the expansion of a gas, V₂ > V₁, which shows that numerically the work of expansion in the reversible isothermal expansion of an ideal gas is greater than van der Waals Gas.