A mass of 15 kg of air in a piston-cylinder device is heated from 25 to 77oC by passing current through a resistance heater inside the cylinder. The pressure inside the cylinder is held constant at 300 kPa during the process, and a heat loss of 60 kJ occurs. Determine the electric energy supplied, in kWh.

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Beverley SmithLv2

13 Nov 2019

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