A rigid tank is filled initially with 5.0 kg of air at a pressure of 0.5 MPa and a temperature of 500 K. The air is allowed to discharge
through a turbine into the atmosphere, developing work until the
pressure in the tank has fallen to the atmospheric level of 0.1 MPa.
Employing the ideal gas model for the air, determine the maximum
theoretical amount of work that could be developed, in kJ. Ignore
heat transfer with the atmosphere and changes in kinetic and potential
energy.