In an experiment on the specific heat of a metal, a 0.20 kg block of the metal at 150ºC is dropped in a copper calorimeter (of water equivalent 0.025 kg) containing 150 cm3 of water at 27ºC. The final temperature is 40ºC. Compute the specific heat of the metal.
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Sol. Let specific heat of the metal is 
, the heat lost by metal block.
Mass of water in the calorimeter
Heat gained by water and calorimeter
By principle of calorimetry, we have
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