An 80-g aluminum calorimeter contains 380 g of water at an ...

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An 80-g aluminum calorimeter contains 380 g of water at an equilibrium temperature of 20C. A 120-g piece of metal, initially at 352C, is added to the calorimeter. The final temperature at equilibrium is 32C.
 
  Assume there is no external heat exchange. The specific heats of aluminum and water are 910 J/kgK and 4190 J/kgK, respectively. The specific heat of the metal is closest to A) 520 J/kg  K.
  B) 480 J/kg  K.
  C) 390 J/kg  K.
  D) 350 J/kg  K.
  E) 560 J/kg  K.

Question 2

A 400-g piece of metal at 120.0C is dropped into a cup containing 450 g of water at 15.0C. The final temperature of the system is measured to be 40.0C.
 
  What is the specific heat of the metal, assuming no heat is exchanged with the surroundings or the cup? The specific heat of water is 4190 J/(kgK). A) 1470 J/(kg  K)
  B) 2830 J/(kg  K)
  C) 3420 J/(kg  K)
  D) 3780 J/(kg  K)
  E) 4280 J/(kg  K)

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Answer to Question 1

A

Answer to Question 2

A

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TY

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