A container equipped with a resistance heater and a mixer is initially filled with 3.6 kg of saturated water vapor at 120??C. Now the heater and the mixer are turned on; the steam is compressed, and there is heat loss to the surrounding air. At the end of the process, the temperature and pressure of steam in the container are measured to be 300??C and 0.5 MPa. The net energy transfer to the steam during this process is (a) 274 kJ (d) 988 kJ (b) 914 kJ (e) 1291 kJ (c) 1213 kJ
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