Air is contained in a vertical piston-cylinder assembly fitted with an electrical resistor. The atmospheric pressure is 100 kPa and piston has a mass of 50 kg and a face area of 0.1 m Electric current passes through the resistor, and the volume of air slowly increases by 0,045 m². The mass of the air is 6.3 kg and its specific energy increases by 42.2 kJ/kg. &-9.8 m/s Determine the heat transfer from the resistor to air for a system consisting, the air alone,

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