A calorimeter contains 0.2 kg of water at `30^@C`. 0.1 kg of water at `60^@C` is added to it, the mixture is well stirred and the resulting temperature if found to be `35^@C`. The thermal capacity of the calorimeter isA. `6300 J//K`B. `1260 J//K`C. `4200 J//K`D. none of these

A calorimeter contains 0.2 kg of water at `30^@C`. 0.1 kg of water at

1.	A calorimeter contains 0.2 kg of water at `30^@C`. 0.1 kg of water at `60^@C` is added to it, the mixture is well stirred and the resulting temperature if found to be `35^@C`. The thermal capacity of the calorimeter isA. `6300 J//K`B. `1260 J//K`C. `4200 J//K`D. none of these
Answer» Correct Answer - B Let X be The thermal capacity of calorimeter and specific heat of water `=4200 J//kg-K` Heat lost by 0.1 kg of water = Heat gained by water in calorimeter+ Heat gained by calorimeter `implies0.1xx4200xx(60-35)` `=0.2xx4200xx(35-30)+X(35-30)` `10500=4200+5 X implies X=1260 J//K`

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A calorimeter contains 0.2 kg of water at `30^@C`. 0.1 kg of water at `60^@C` is added to it, the mixture is well stirred and the resulting temperature if found to be `35^@C`. The thermal capacity of the calorimeter isA. `6300 J//K`B. `1260 J//K`C. `4200 J//K`D. none of these

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