A refrigerator whose coefficient of performance is 5 extract heat from the cooling compartment at the rate of 250J/cycle. How much electric energy is spent per cycle? How much heat per cycle is discharge to the room?
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Q 2= 250 J/CYCLE
COP=5
COP=Q 2/W
W=Q 2/COP
W=250/5=50
HEAT DISCHARGED /CYCLE TO THE ROOM
Q 1 = Q+W = 250+50 = 300 J /CYCLE.
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