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19) What is the best coefficient of performancg for a heat pump that has a hot reservoir temperature of 50.0°C and a cold reservoir temperature of -20.0°C? a)3.62 6 c 0.28 d) 4,61 1.28 Comes from 15.5 Applications of Thermodynamics: Heat Pumps and Refrigerators
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For coefficient of performance is heat COP eatcold where cop is coefficeint of performance he50+273- 323 k Tcold20+273 253k COP-_heat heat cold 323 323-253 -4.61 Correct option is (d)

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