2. Energy – The capacity for doing work The ability to change matter

3. Energy Radiant energy – solar energy or electromagnetic spectra energy

4. Energy Radiant energy – solar energy or electromagnetic spectra energy Thermal energy – energy associated with the random motions of atoms and molecules. (heat energy)

5. Energy Radiant energy – solar energy or electromagnetic spectra energy Thermal energy – energy associated with the random motions of atoms and molecules. (heat energy) Chemical energy – energy released as a reaction occurs (stored energy in a molecule) (discuss explosions, natural gas etc.)

6. Energy Radiant energy – solar energy or electromagnetic spectra energy Thermal energy – energy associated with the random motions of atoms and molecules. (heat energy) Chemical energy – energy released as a reaction occurs (stored energy in a molecule) (discuss explosions, natural gas etc.) Potential energy – energy due to position

7. Energy Radiant energy – solar energy or electromagnetic spectra energy Thermal energy – energy associated with the random motions of atoms and molecules. (heat energy) Chemical energy – energy released as a reaction occurs (stored energy in a molecule) (discuss explosions, natural gas etc.) Potential energy – energy due to position Kinetic energy – energy of motion

8. Systems System – specific part of the universe that is of interest or being studied Surroundings – everything else

9. Systems Open system – can exchange mass and energy Closed system – can transfer energy but not mass Isolated system – cannot transfer mass or energy

10. Energy 1st law of thermodynamics – Energy can be converted from one form to another but cannot be created or destroyed Exothermic – reaction that gives off energy – gets warmer to touch Endothermic – reaction that absorbs energy – gets cooler to touch

11. Activation Energy (Ea) Energy needed to get a chemical reaction to start