Calculate the work done during the isothermal reversible expansion of a gas that satisfies the virial equation

Question:

Calculate the work done during the isothermal reversible expansion of a gas that satisfies the virial equation of state, eqn 1.19. Evaluate
(a) The work for 1.0 mol Ar at 273 K (for data, see Table 1.3) and
(b) The same amount of a perfect gas. Let the expansion be from 500 em-1 to 1000 em-1 in each case.