Freezing compartment of a refrigerator is at 0 ° C and room temperature is 27 . 3 ° C . Work done…

Freezing compartment of a refrigerator is at 0°C and room temperature is 27.3°C. Work done by the refrigerator to freeze 1 g of water at 0°C is Lice=80 cal g-1
  1. 336 J
  2. 33.6 J
  3. 3.36 J
  4. 40 J

Solution

The energy released by refrigerator,

Q2=mL=1×80×4.2 J

Recall the formula of the coefficient of performance,

K=Q2W=T2T1-T2⇒80×4.2W=27327.3⇒W=80×4.210=33.6 J

Asked in: AP EAMCET 2018 (25 Apr Shift 1)

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