1. Calorimetry: Measuring Heat
Definitions:
Heat Capacity (C): The heat required to change the temperature of an object by 1.00C
How this situation responds to heat will depend on both the wok and the food.
How would the heat capacity change if more food were added?
More food  More heat required Higher heat capacity
Cwok & food = kJ/C (approx.)
500 kJ/C is how the wok & food respond to heat energy.

2. Calorimetry: Measuring Heat
Definitions:
Specific heat (c): The heat (J) required to change the temperature of 1.00 gram of a substance by 1.00C
How this situation responds to heat will depend on both how much water there is and on the temperature change required.
Cwater = cal/gC
Cwater = J/gC (know this number and units)
To increase the temp. of 1 gram of water by 1C will require J of heat energy.

3. Calorimetry: Measuring Heat
Metal Block
Thermometer
93.0C
Mass = 30.5 g
Temp = 93.0C
Block losing heat
Final T = 31.1C
Final T = 31.1C
Water gaining heat
Water H2O
22.0C
Mass = 50.0 g
Temp = 22.0C
Coffee Cup Calorimeter (insulator)
What is the specific heat (c) of the metal block?

4. Calorimetry: Measuring Heat
Metal Block
Heat Lost by the Metal Block
Thermometer
q = m  c  T
Mass = 30.5 g
q = m  c  (Tf – Ti)
Temp = 93.0C
q =  c  (31.1 – 93.0)
q =  c
Final T = 31.1C
Heat gained by the Water
q = m  c  T
Water H2O
q = m  c  (Tf – Ti)
Mass = 50.0 g
Temp = 22.0C
q =   (31.1 – 22.0)
Coffee Cup Calorimeter (insulator)
q = J

5. Calorimetry: Measuring Heat
Metal Block
Thermometer
qlost qgained = 0
c = 0
c =
c = J/gC
Water H2O
Coffee Cup Calorimeter (insulator)
The specific heat of the block is J/gC