Pure component ther 1.8 - promblems air initially at 1 atm is expanded in a piston cylinder arrangement to twice its initial volume. the temperature is held constant at 100°c. find the heat added and work done. 1. air enters an adiabatic turbine at 1000°c and 10 atm and exhausts at 1 atm. the turbine efficiency is 75% compared with isentropic operation. determine the mass flow rate of air needed to produce 75 mw of power.