1.5-kg of water that is initially at 90◦C with a quality of 5 percent occupies a spring-loaded piston-cylinder device. This device is now heated until the pressure rises to 900 kPa and the temperature is 280◦C. Determine the total work produced during this process, in kJ.

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.