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A piston-cylinder device is insulated and contains 0.005 m3 of saturated liquid water at a constant pressure of l50 kPa.

1. A piston-cylinder device is insulated and contains 0.005 m3 of saturated liquid
water at a constant pressure of l50 kPa. An electric resistance heater inside the
cylinder is now turned on, and 1800 kJ of energy is transferred to the steam.
Determine the entropy change of the water during this process, in kJ/K.

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