1. Activation Energy and Equilibrium Unit 14 Insight Schools Physical Science

4. Endothermic and Exothermic Reactions Exothermic Reactions Endothermic Reactions Energy Energy is Released to the surroundings Energy is Absorbed from the surroundings Signs Gets Hot Flame Light Gets Cold Dark color Examples Combustion of Methane Cold Pack Photosynthesis

5. Factors That Influence Reaction Rates Affect on Reaction Rate Catalyst Increases the Reaction Rate Concentration of Reactants Increase in Concentration increases the reaction rate because of an increase in particle collisions. Surface Area More surface area increases the reaction rate. (Smaller particles give a greater overall surface area when all the particles surfaces are added together.) Temperature Increase in Temperature increases the reaction rate because of an increase in particle collisions. Stirring Increases the Reaction Rate by increasing the number of collisions.

6. Factors That Influence Reaction Rates Affect on Reaction Rate Catalyst Concentration of Reactants Surface Area Temperature Stirring

7. The Affect of Catalysts

8. Exothermic vs Endothermic

13. Le Chatelier’s Principle

17. Examples of Changes in Equilibrium CO 2 CO 2 CO 2 CO 2