(II) A heat pump is used to keep a house warm at 22°C. How much work is required of the pump to deliver 3100 J of heat into the house if the outdoor temperature is (a) 0°C, (b) –15°C? Assume a COP of 3.0. (c) Redo for both temperatures, assuming an ideal (Carnot) coefficient of performance COP = TH/(TH – TL).

University Physics Volume 2
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ISBN:9781938168161
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Chapter4: The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 67AP: A 300-W heat pump operates between the ground, whose temperature is 0 , and the interior of a house...
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(II) A heat pump is used to keep a house warm at 22°C.
How much work is required of the pump to deliver 3100 J
of heat into the house if the outdoor temperature is
(a) 0°C, (b) –15°C? Assume a COP of 3.0. (c) Redo for
both temperatures, assuming an ideal (Carnot) coefficient
of performance COP = TH/(TH – TL).
Transcribed Image Text:(II) A heat pump is used to keep a house warm at 22°C. How much work is required of the pump to deliver 3100 J of heat into the house if the outdoor temperature is (a) 0°C, (b) –15°C? Assume a COP of 3.0. (c) Redo for both temperatures, assuming an ideal (Carnot) coefficient of performance COP = TH/(TH – TL).
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