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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 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 | SaraNextGen Top Answer

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

1 Answer
127 votes
Answer Key / Explanation : (d) -

192×S×(100−21.5)

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

⇒ S =916

127 votes


127