Air enters an adiabatic turbine at 2.8 mpa and 400 °c and expands to a lower pressure of 150 kpa. assume an isentropic efficiency of 90% for the turbine. (a) assume air to be an ideal gas with constant specific heats at the anticipated average temperature of 400 k. why is it safe to do so? (6) solve for the actual work per unit of mass produced by the turbine. (c) determine the actual outlet temperature of the turbine. (d) draw the t-s diagram for the air passing through the turbine (show the actual and isentropic processes). (e) how much entropy will be generated per unit of mass while the turbine is running?