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Question

Steam at 100C is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at 15C till the temperature of the calorimeter and its contents rise at 80C. The mass of the stem condensed in kilogram is

A
0.130
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B
0.065
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C
0.260
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D
0.135
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Solution

The correct option is A 0.130
Heat lost by steam = Heat gained by water + calorimeter
mL+ms(10080)=1.12×s×(8015)
or m[540+(1×20)]=1.12×1×65
or m=1.12×1×65560=65500 kg or m=0.13 kg

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