A steam turbine is used to generate electricity at a pulp and paper manufacturing plant. Superheated steam at 10 MPa and 780 K enters the turbine with a mass flow rate of 38.7 kg/sec. The steam exits the turbine at 318 K with a quality of 0.88. The turbine operation can be assumed to be adiabatic, and the changes in both the kinetic and potential energies of the entering and exiting steam are negligible.

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.