250g of lead at 170oC is dropped into 100g of water at 0oC. If the...

JAMB 1982

250g of lead at 170^oC is dropped into 100g of water at 0^oC. If the final temperature is 12^oC, the specific heat of lead is (specific heat of water is 4,200J/kg^oC)

A. 39.5J/kg^oC
B. 50.4J/kg^oC
C. 127.6J/kg^oC
D. 154.6J/kg^oC
E. 173.4J/kg^oC

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Correct Answer: Option C

Explanation

Heat lost = heat gained

0.25 x C₁ x (170 - 12) = 0.1 x 4200 x (12 - 0)

C₁ = 127.6J/kg^oC

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250g of lead at 170oC is dropped into 100g of water at 0oC. If the...

Correct Answer: Option C

Explanation

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