1. Controlling Chemical Reactions
Chapter 6
Section 3

2. Activation Energy
A reaction won’t begin until it has enough energy to get it going. . . Activation energy is the minimum amount of energy needed to start a chemical reaction Just enough to get it going!

3. EXothermic = Heat is EXiting . . .Explodes . .
Definition: A reaction in which energy is RELEASED
EXothermic = Heat is EXiting . . .Explodes . .
Clues:
Burning
Exploding
Freezing
Condensing
Sound
Surrounding Warmer
Remember, heat is also
called __________________

4. Endothermic Definition: A reaction in which energy is ABSORBED
ENDOthermic = heat flow INTO object
Internal temperature of object is warmer!
Clues:
Growing
Melting
Boiling
Cooking
Surrounding Colder

5. Endothermic

6. Endo v. Exo Graphs
Send a private message with your answers to these questions. Complete sentences!

7. Let’s test your knowledge!
Download and complete the worksheet titled “Chemical Reactions”
Be ready to answer these in class through the poll!
A. Endothermic B. Exothermic

8. Rates of Chemical Reactions
Surface Area
Temperature
Concentration
Catalysts
Inhibitors

9. Rates of Chemical Reactions
Surface Area
Temperature
Concentration
Catalysts
Inhibitors
Increase in Heat = Faster Reaction

10. Rates of Chemical Reactions
Surface Area
Temperature
Concentration
Catalysts
Inhibitors
Higher Concentration
= Faster Reaction

11. Rates of Chemical Reactions
Surface Area
Temperature
Concentration
Catalysts
Inhibitors
A material that increases the rate of reaction by lowering the energy needed to get it going.

12. Rates of Chemical Reactions
Surface Area
Temperature
Concentration
Catalysts
Inhibitors
A material used to decrease the rate of reaction

13. Flameless Ration Heaters

14. Flameless Ration Heaters Questions