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Question

50g of copper is heated to increase its temperature by 10C. If the same quantity of heat is given to 10g of water, the rise in its temperature is (specific heat of copper = 420J/kg/C)


A

5°C

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B

6°C

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C

7°C

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D

8°C

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Solution

The correct option is A

5°C


Same amount of heat is supplied top copper and water; so

mcccΔTc = mωcωΔTω

(ΔT)ω = mcccΔTcmωcω = 50 × 103 × 420 × 1010 × 103 × 4200 = 5C


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