Question

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A A ref refrigerator extracts energy at take of 100w. how much time will it take to cool a lemon squash from 30c to 5c.
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Answer 1

Given :

Mass of  lemon squash , m = 0.5 kg .

Decrease in temperature ,

( In difference units can be changed from °C to K )

Average heat removed per second ,  .

Specific heat capacity of  squash , S = 4200 J kg- K

​Now , energy loss is ,

Putting values in above equation .

Hence , this is the required solution .