1. Thermochemistry
Study of transfers of energy as heat that accompany chemical rxns and physical changes
Part 1

2. Energy The ability to do work or produce heat
Potential energy = positional energy
Kinetic energy = energy of motion
The energy absorbed or released as heat in a chemical or physical change is measured in a calorimeter.

3. Heat
Temperature = a measure of the average kinetic energy of the particles in a sample
Heat = energy that transfers between samples due to a diff. in temperatures
We measure heat is various units:
calorie = amount of heat required to raise 1 gram of water 1 degree celsius
Food Calorie = 1 kilocalorie [1 Calorie = 1000 calories]
Joule (J) = the SI unit of heat and energy [1 calorie = J]

4. Specific Heat
Amount of energy required to raise 1 gram of a substance by 1 degree celsius
Each substance has its own specific heat [see p503 figure 1.2]
Specific Heat equation:
q = m x c x DT
q = heat m = mass c = specific heat
DT = change in temperature (oC or K)

5. Specific Heats of Common Substances