Quite some time ago, Frank Lloyd Wright designed a one-mile-high building. Suppose that, in such a building, steam for the heating system enters a pipe at ground level as dry, saturated vapor at 200 kPa. On the top floor of the building, the pressure in the pipe is 70 kPa. The heat transfer from the steam as it flows up the pipe is 116 kJ/kg of steam. Taking the one-mile-high pipe as a control volume (open system), determine the quality of the steam at the top of the pipe.