1. Heat and Temperature

2. The difference Heat – the energy that flows from hot to cold.
Measured in Joules (J).
Temperature – measure of average kinetic energy.
Measured in Celsius (C) or Kelvins (K).

3. What factors affect the amount of heat flow?
Mass (m) – grams, kilograms
Change in temperature (DT) – Kelvins
Specific heat (C) – amount of heat required to raise the temperature of 1 g of a substance 1 degree. Different substances have different C values! Values in reference tables.

4. Calculations
Q = CmDT
Specific
heat
Heat
Temp.
Mass

5. Practice Problems
1. How much heat is lost when a solid aluminum ingot with a mass of 4110 g cools from 660oC to 25oC? (Cp for Al = J/goC)
2. If 7.5 x 104J of energy are released when 500 g of a metal cools from 100.0oC to 20.0oC, what is the specific heat of the metal?