Thermal Energy

1
Thermal Energy
2

• Principle of Heat ExchangeWhen heat is
  transferred from one body to another, the amount
  of heat lost by the hot body equals the amount of
  heat gained by the cold body.

3

• Principle of Heat ExchangeWhen heat is
  transferred from one body to another, the amount
  of heat lost by the hot body equals the amount of
  heat gained by the cold body.

Heat Gained
Heat Lost
4

• Red Blue 0.80 kg of red hot water at 90C is
  allowed to mix with 0.70 kg of cold blue water at
  5C.a) What will happen when the divider is
  removed?b) What is the final temperature of
  the mixture?

5

• A 200-g piece of iron was heated and was
  submerged in 150 g of water at 20C to be cooled
  quickly. The final temperature of the iron and
  the water is _____C. Determine the initial
  temperature of the iron.
• (Assume two significant digits.)

6
Calorimetry

• the careful and precise measurement of heat
  transfer
• 1 cal 4.1858 J