Derive a relation showing reversible work of expansion from volume `V_(1)` to `V_(2)` by ‘n’ moles of a real gas obeying van der Waals’ equation at temperature T where volume occupied by molecules may be taken as negligible in comparison to total volume of gas.

Answer

`W=-nRT"log" (V_(2))/(V_(1))-n^(2)a[(1)/(V_(2))-(1)/(V_(1))]`