Air in In a turbine, a constant mass flow of air of 90 C is expanded from 240 bar to 200 bar. At the exit of the turbine, the tempe- rature has dropped to 80C. Look up the properties of air in a reliable source. Kinetic and potential energy are neglected. Calculate the heat flow O between the turbine and its surroun- dings. Is heat added to or withdrawn from the surroundings? Turbine PA T1 Air out P2 Tz