1. Chapter 13 Section 4 Rates of Reaction
You will have only one question today for bell work. You MUST JUSTIFY your answer!

4. Review SYNTHESIS: A + B  AB DECOMPOSITION: AB  A + B
SINGLE- DISPLACEMENT: A + BX  AB + X
DOUBLE DISPLACEMENT: AX + BY  AB + XY

5. Success Criteria: I can describe an endothermic reaction.
I can describe an exothermic reaction.
I can describe the difference between a catalyst and an inhibitor.
TOC:
#23. Rates of Reactions Notes
#24. Ch 13, section 4: Activation Energy

6. Chemical reactions All Chemical reactions require chemical energy.
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All Chemical reactions require chemical energy.
Energy is released or absorbed during the reaction.

7. Exothermic reaction
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If the reactant energy is greater than the product energy, energy is released. A chemical reaction where the energy is released is called an exothermic reaction.
“EXO” – go out
“thermic” -- heat

8. Endothermic Reaction
If the reactant energy is less than the product energy, energy is absorbed. A chemical reaction where energy is absorbed is called an endothermic reaction.
“ENDO” – go in
“thermic” -- heat

9. Activation Energy
Activation energy – minimum amount of energy needed to start a reaction. There must be something to get the reaction started.
Sources of activation energy –friction, electric spark, light
The rate of reaction is the measure of how rapidly a reaction takes place.

10. Five factors that can affect the rate of reaction:
1. Temperature increases rate of reaction because particles are moving faster.
2. Concentration increases rate of reaction because the amount of particles increases.
3. Surface area increases rate of reaction because of the exposed surface increases.
4. A catalyst is something that speeds up a reaction without being changed.
5. An inhibitor is something that slows down a reaction without being changed.

13. Exit Ticket

14. Exit Ticket