5-20 1-kg of water that is initially at 90°C with a quality of10 percent occupies a spring-loaded piston-cylinder device, such as that in Fig. P5-20. This device is now heated

until the pres-sure rises to 800 kPa and the temperature is 250°C. Determine the total work produced during this process, in kJ. Answer: 24.5 kJ