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Q.

A freezer has coefficient of performance equal to 5. When  3.6×106J work is done on the freezer, what mass of water at 00C is converted into ice cubes at 00C.

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a

≈5kg

b

≈3.6kg

c

≈54kg

d

≈107kg

answer is C.

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Detailed Solution

We know, Coefficient of Performance,  COP=QWAnd  Q=mL and latent heat of fusion of water,  L=334×103Jkg-1Hence,  m=COP×WL=5×3.6×106334×103=53.8kg
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