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Question

Steam at 100oC is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at 15oC till the temperature of the calorimeter and its contents rises to 80oC. The mass of the steam condensed in kg 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 D

0.135


Heat required
Q=(1.1+0.02) × 103 × 1 × (8015)=72800 cal.
Therefore, mass of steam condensed (in kg)
m=QL=72800540 × 103=0.135kg.


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