Steam enters an adiabatic turbine at 8 MPa and 520 °C with a volumetric flow rate of 0.8 m3/s, and exits at 30 kPa. The turbine isentropic efficiency is 90%.
a) Determine the specific entropy of the steam at the turbine exit
b) Determine the rate of entropy generation of the steam inside the turbine
c) List a potential cause of the entropy generation you found in part b (note that heat transfer is not a valid response)