A refrigerator works between 0ºC and 27ºC. Heat is to be
removed from the refrigerated space at the rate of 50 kcal/
minute, the power of the motor of the refrigerator is
(a) 0.346 kW (b) 3.46 kW
(c) 34.6 kW (d) 346 kW
Answers
Answered by
0
T
1
−T
2
T
2
=
W
Q
2
300−273
273
=
W
50,000
W=
273
27×50,000
cal/min
p=
t
W
=
60×273
4.2×27×50,000
J/s
=346 watt=0.346 kW
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