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Water undergoes a constant‐volume process within a piston–cylinder assembly from saturated liquid at 4 bar to...

Water undergoes a constant‐volume process within a piston–cylinder assembly from saturated liquid at 4 bar to a final pressure of 50 bar. Kinetic and potential energy effects are negligible. Determine the work and the heat transfer, each in kJ per kg of water. [7 points]

Engineering   Mechanical-Engineering   
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Answer #1

First, the properties of water at 4 bar is taken from the standard pressure tables of saturated water. Then the final temperature of the process is estimated using the relation of constant volume process.

As the process is a constant volume process the work done in the process is zero.

Work Done (W) = 0 kJ/kg of water.

Heat transfer (Q) = 1394.105 kJ/kg of water.

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