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Q.

The temperature of a body rises by 44oC when a certain amount of heat is given to it. The same heat when supplied to 22g of ice at -8oC, raises its temperature TO 16oC. The water equivalent of the body in grams is ________.  [Given swater 1cal/g∘C and Lf=80cal/g,sice=0.5cal/g∘C

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answer is 50.0.

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Detailed Solution

Supplied heat              =(22)(0.5)(8)+(22)(80)+(22)(1)(16)=88+1760+352=2200calHeat capacity of the body =2200cal44∘C=50cal/CWater equivalent of the body              = Heat capacity of the body  spcific heat capacity of water =50cal/∘C1cal/g∘C=50g
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