A piston-cylinder device initially contains 20 g of saturated water vapor at 300 kPa. A resistance heater

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A piston-cylinder device initially contains 20 g of saturated water vapor at 300 kPa. A resistance heater is operated within the cylinder with a current of 0.4 A from a 240 V source until the volume doubles. At the same time a heat loss of 4 kJ occurs. Determine.
(a) The final temperature.
(b) Duration of the process.
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