To meet energy regulations, the coefficient of performance of cooling of a refri

ID: 1449951 • Letter: T

Question

To meet energy regulations, the coefficient of performance of cooling of a refrigerator that operates on a Carnot cycle must be 4.00.

Part A

At what rate is this refrigerator expelling thermal energy into the kitchen if it consumes electrical energy at a rate of 215 W ?

Express your answer with the appropriate units.

To meet energy regulations, the coefficient of performance of cooling of a refrigerator that operates on a Carnot cycle must be 4.00.

Part A

At what rate is this refrigerator expelling thermal energy into the kitchen if it consumes electrical energy at a rate of 215 W ?

Express your answer with the appropriate units.

dQdt =

here,

COP = 4

Power, p = 215 Watts

Since Power = Work done/time
W = P*t

also, COP = Q/W
4 = Q/w

Heat expelled is given as:
Q = 4 * w
Q = 4 * P*t
Q/t = 4 * P
Q/t = 4*215
Q/t = 860 J

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