QUESTION 3: [25 marks] A Carnot engine operates with air, using the cycle shown below. Determine the thermal efficiency and the work output for each cycle of operation. You can assume air is an ideal gas having k = 1.4 and R = 0.287 kJ/kg K. Solution: P 2 T = 500 K 80 kPa 3 4 T = 300 K 10 m³/kg