Steam enters an adiabatic turbine steadily at 6 MPa and 530oC, and exits at 2.5 MPa, 420oC.

Question:

Steam enters an adiabatic turbine steadily at 6 MPa and 530oC, and exits at 2.5 MPa, 420oC. The mass flow rate is 0.127 kg/s. Determine
(a) The external power.
(b) The ratio of exit flow area to the inlet flow area to keep the exit velocity equal to the inlet velocity. Neglect ke and pe.