A sample of dry air has a temp. of 300K, a volume of 3 liters, and a pressure of 4 atmospheres. The air then undergoes the following changes: (a) it is warmed under a constant pressure to 500K, (b) it is cooled under contanst volume to 250K, (c) it is cooled under constant pressure to 150K, and (d) it is warmed under constant volume to 300K.
Calulate the total work done