3 moles of argon gas initially at a temperature of 20º C, occupy

Question

a volume of 10 liters. The gas undergoes an expansion at constant pressure to a volume of 20 L; then expands adiabatically until it returns to its initial temperature. a) Plot the process on aPV diagram. Calculate: b) the amount of heat that was given to the gas throughout the process, c) the total change in the internal energy of the gas,d) the total work done during the process, e) the final volume of the gas.