samantacr240 samantacr240

02-08-2024
Physics

Answered

a) In a leat engine, 20 kJ of heat is extracted from a hot source with 12 kJ of heat discarded into the cold sink. Calculate the efficiency of the engine.
b) Calculate the coefficient of performance of a refrigerator operating between 4°C and 25°C.
c) State and compare the changes in entropy observed in (a) and (b).

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