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An unknown metal of mass 192 g heated to a temperature of 100°C was immersed into a brass calorimeter of mass 128 g containing 240 g of water at a temperature of 8.4°C. Calculate the specific heat of the unknown metal if water temperature stabilizes at 21.5ºC. (Specific heat of brass is 394 J kg –1 K –1 )

1. 458 J kg –1 K –1
2. 1232 J kg –1 K –1
3. 654 J kg –1 K –1
4. 916 J kg –1 K –1

Correct answer: 916 J kg –1 K –1

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