Problem 3. A cylinder contains Nitrogen gas (C = 20.8J/(mol K), y= 1.4) at a pressure of 2.0 atm and a temperature of 300K. Its initial volume is 2.0 liters. The Nitrogen gas is next carried through the following processes: 1) It is heated at constant volume to a temperature of 450K. 2) It is expanded at constant temperature to a volume of 3.0 liters. 3) It is compressed at constant pressure until its volume is 2.0 liters, returning it to its initial state. a) Draw the PV curve of this cycle. Be sure to label the temperature, pressure, and volume at each endpoint. b) What is the efficiency of this heat engine?
