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Question

A calorimeter of water equivalent 5×103 kg contains 25×103 kg of water. It takes 3 minutes to cool from 28C to 21C. When the same calorimeter is filled with 30×103 kg of turpentine oil, then it takes 2 minutes to cool from 28C to 21C. Find the specific heat of turpentine oil.

A
1.5 J kg1C1
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B
0.5 J kg1C1
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C
45 J kg1C1
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D
5 J kg1C1
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Solution

The correct option is B 0.5 J kg1C1
(m+w)θt1=(mtct+w)θt2=(25×103+5×103)×73=(30×103ct+5×103)×72ct=0.5 J kg1C1

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