please answer all parts and explain

3. Consider 2.00molN(g) that undergoes reversible, isothermal expansion from 4.50L to 25.0L at a temperature of 677K. a. Solve for the work, w, of this expansion assuming that the gas is described by the ideal gas equation of state. b. Solve for the work, w, of this expansion assuming that the gas is described by the van der Waals equation of state. c. Calculate the % difference between the work as described by these two equations of state. d. Which would you expect to be more correct