Question: A heat engine operates between two reservoirs at 7 2 7 C and atmosphere ( 2 7 C ) . The engine is used to

A heat engine operates between two reservoirs at 727C and atmosphere (27C). The engine is used to drive a heat pump that extracts heat from the atmosphere (27C) at a rate twice that the heat engine rejects heat. The efficiency of the heat engine is 25 of maximum possible efficiency, and the COP of the heat pump is 12 of the maximum possible COP. What is the temperature of the reservoir that heat pump rejects heat into?
A heat engine operates between two reservoirs at

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