Specific Heat Practice

1
Specific Heat Practice

• 1. Iron metal has a specific heat of 0.449 J/goC.
  How much heat (in J) is transferred to a 5.00 g
  piece of iron, initially at 20.0 oC, when it is
  placed in a beaker of boiling water at 1 atm? (3
  digits)
• 2. How many kilocalories of energy are given off
  to lower the temperature of 100.0 g of iron from
  150.0 oC to 35.0 oC? (4 digits)
• 3. If 3.47 kJ were absorbed by 75.0 g H2O at 20.0
  oC, what would be the final temperature of the
  water? (3 digits)
• 4. A 100. g sample of water at 25.3 oC was
  placed in a calorimeter. 45.0 g of lead shots
  (at 100 oC) was added to the calorimeter and the
  final temperature of the mixture was 34.4 oC.
  What is the specific heat of lead? (3 digits)
• 5. A 17.9 g sample of unknown metal was heated to
  48.31 oC. It was then added to 28.05 g of water
  in an insulted cup. The water temperature rose
  from 21.04 oC to 23.98oC. What is the specific
  heat of the metal in J/goC? (3 digits)

2

• 1. Iron metal has a specific heat of 0.449 J/goC.
  How much heat is transferred to a 5.00 g piece
  of iron, initially at 20.0 oC, when it is placed
  in a beaker of boiling water at 1 atm? (3 digits)
• 2. How many kilocalories of energy are given off
  to lower the temperature of 100.0 g of iron from
  150.0 oC to 35.0 oC? (4 digits)
• 3. If 3.47 kJ were absorbed by 75.0 g H2O at 20.0
  oC, what would be the final temperature of the
  water? (3 digits)
• 4. A 100. g sample of water at 25.3 oC was
  placed in a calorimeter. 45.0 g of lead shots
  (at 100 oC) was added to the calorimeter and the
  final temperature of the mixture was 34.4 oC.
  What is the specific heat of lead? (3 digits)
• 5. A 17.9 g sample of unknown metal was heated to
  48.31 oC. It was then added to 28.05 g of water
  in an insulted cup. The water temperature rose
  from 21.04 oC to 23.98oC. What is the specific
  heat of the metal in J/goC? (3 digits)

180. J
1230 kcal
31.1 oC
1.28 J/g oC
0.792 J/goC