Question: Problem 3 (10 marks) An insulated rigid tank contains 2 m' of air at 400 kPa and 77 C. A valve connected to the tank

Problem 3 (10 marks) An insulated rigid tank contains 2 m' of air at 400 kPa and 77 C. A valve connected to the tank is opened allowing air to escape until the pressure drops to 200 kPa. The air temperature during this process is maintained constant by an electric heater inside the tank. Assuming that air is an ideal gas with specific heats Cp = 1.005 kJ/kg.K, Cv = 0.718 kJ/kg.K, and gas constant R = 0.287 kPa.m3/kg.K. Determine the electrical work done during this process

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