4-22 1 kg of water that is initially at
90\deg C
with a quality of 10 percent occupies a spring-loaded piston-cylinder device, such as that in Fig. P4-22. This device is now heated until the pressure rises to 800 kPa and the temperature is
250\deg C
. Determine the total work produced during this process, in kJ. Answer. 24.5 kJ FIGURE P4-22