At the inlet of a steam turbine, the pressure and the temperature of the steam are P1 = 1 MPa and T = 300 C respectively, its outlet pressure and quality are P2 = 7.5 kPa, x2 = 0.9, respectively. Assuming that the environmental temperature is To = 20 C and the ambient pressure is Po = 100 kPa, and the changes in kinetic and potential energies are negligible; a) Calculate the work done by the steam. b) If an isentropic expansion process could take place between the inlet conditions and the outlet pressure, how much work would be done by the steam? c) Show both the real and isentropic expansion processes on a T-s diagram (including saturation lines and T, x, P values). d) Determine the maximum work done by unit mass of the steam at the specified inlet conditions. e) Determine the maximum work done by unit mass of the steam between inlet and outlet states.