The initial state of 1.00 mol of dilute gas is P1 = 9.00 atm, V1 = 1.00 L, and Eint1 = 680 J, and its final state is P2 = 1.00 atm, V2 = 8.00 L, and Eint 2 = 810 J. The gas is allowed to expand at constant pressure to a volume of 8.00 L. It is then cooled at constant volume until its pressure is 1.00 atm.
Calculate the work done by the gas.