Steam enters an adiabatic turbine with a pressure of 2 mpa and temperature of 250 c and leaves at 50 c. a) how much heat is transferred between the turbine and its environment? b) how much work is produced by this turbine if the process the steam experinces while passing through the turbine is internally reversible? c) what is the turbine outlet pressure if the isentropic efficiency of this turbine is 80%? d) how much work does the turbine produce if the turbine isentropic efficiency is 80%? explain the steps.