# 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 a temperature of 8.4°c calculate the specific heat of the unknown metal if water temperature stabilizes at 21.5°c(specific heat of brass is 394 J k−1 K−1) (a) 1232 J kg−1 K−1 (b) 458 J kg−1 K−1 (c) 654 J kg−1 K−1 (d) 916 J kg−1 K−1

## Question ID - 50251 :- 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 a temperature of 8.4°c calculate the specific heat of the unknown metal if water temperature stabilizes at 21.5°c(specific heat of brass is 394 J k−1 K−1) (a) 1232 J kg−1 K−1 (b) 458 J kg−1 K−1 (c) 654 J kg−1 K−1 (d) 916 J kg−1 K−1

3537

192×S×(100−21.5)

= 128×394×(21.5−8.4)+240×4200×(21.5−8.4)

⇒ S =916

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