The final pressure is nearest:
The frictionless piston shown in its initial position provides a pressure of 600 kPa in the cylinder. Energy is added until the temperature reaches 250°C.
A) 920 kPa
B) 980 kPa
C) 1020 kPa
D) 1220 kPa
A) 920 kPa
The steam at 250°C is assumed to be superheated. The specific volume is then
At T = 250ºC and v = 0.25 m3/kg, Table C-3 predicts that the pressure is between 0.8 MPa and
1.0 MPa, close to 0.92 MPa.
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