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Chrome File Edit View History Bookmarks People Window Help 97% mi- Mon 1:21 PM emView?assignmentProblemiD 785971658offset-next Secure | https://se Ch.21 HW Pas2Problem 21.52 e previous | 9 of 10 Problem 21.52 Part A An electric heat pump used as a heater operates on a Camot cycle. The low-temperature reservoir consists of a pipe driven 10 m into the ground to a region where the temperature is aways 10 C The high-bemperature reservoir is the interior of a house, kept at 20 C For every 1.0 J of electrical energy uned to run the heat pump, what quantty of thermal energy is delivared to the house? Express your answer with the appropriate units -ValueUnits My Answers Ghee Up Part B What is the coefcient of performance of heating of the heat pump? Express yw wer using significant digits. My Answers Give Part C 'Crater than underground, what quathy of thermal energy would 10Joelectrical rte low4emperature reservor were the ar outsiderohane at-A energy deliver to the house? Express your answer with the appropriate units 9-Value Units

Explanation / Answer

Given that

lower temperature T2=10 C

higher temperature T1=20 C

work done W=1 J

now we find the amount of heat energy delivered

W/Q=1-T2/T1

1/Q=1-10/20

heat energy Q=1/0.5=2 J

now we find the coefficient of performance of heating to heat pump

coefficient of heat performance =1/2=0.5%

now we find the thermai energy at outside lower temperature =-24 C

1/Q=1+24/20

1/Q=2.2

thermai energy Q=0.455 J

now we find the coefficient of performance of heating of heat pump

coefficient of performance =1/0.455=2.2%

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