A reversible power cycle receives 1000 Btu of energy by heat transfer from a reservoir at 1540 F and discharges energy by heat transfer to a reservoir at 40 F. Determine the thermal efficiency and the net work developed, in Btu.

A power cycle operates between a reservoir at temperature T and a lower-temperature reservoir at 280 K. At steady state, the cycle develops 40 kW of power while rejecting 1000 kJ/min of energy by heat transfer to the cold reservoir. Determine the minimum theoretical value for T, in K.

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A certain reversible power cycle has the same thermal efficiency for hot and cold reservoirs at 1000 and 500 K, respectively, as for hot and cold reservoirs at temperature T and 1000 K. Determine T, in K.


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