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A device uses a Stirling cycle on 378 moles of a monatomic ideal gas between two...

A device uses a Stirling cycle on 378 moles of a monatomic ideal gas between two reservoirs with temperatures of 389 K and 659 K as a refrigerator or a heat pump. The volume of the system shifts between 0.94 m3 and 2.44 m3.

1) How much energy does this device remove from the cold reservoir?

2)How much energy does this device transfer into the hot reservoir?

3)How much work is done by the device on the gas?

4)What is the coefficient of performance of this engine if we use it to cool a refrigerator?

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