1. Chemical Reactions

2. Learning Objectives
Define the following terms: chemical reaction, reactant, product, and activation energy
Explain how chemical reactions affect chemical bonds in compounds

3. Chemical Reaction CO2 + H2O H2CO3
A chemical reaction is a process that changes or transforms one set of chemicals into another.
CO2 + H2O H2CO3
Carbon Water Carbonic acid
Dioxide
Reactants Product

4. Reactants
O2 + 2H H2O
Reactants - elements or compounds that enter into a chemical reaction.

5. Products
O2 + 2H H2O
Products - elements or compounds produced by a chemical reaction.

6. Equilibrium
O2 + 2H H2O
Equilibrium - the reaction takes place at an equal rate in both directions and the reactant and product concentration stays the same.

7. Chemical Reactions Require Energy
CO2 + H2O H2CO3
Carbon Water Carbonic acid
Dioxide
Chemical reactions always involve changes in the chemical bonds that join atoms in compounds. These reactions require energy.

8. Activation Energy
Energy
Activation
Energy
Reactants
Products
Course of Reaction
Activation energy - the amount of energy required for a chemical reaction to get started.

9. Activation Energy
Products
Activation energy - the amount of energy required for a reaction to get started.

10. Types of Metabolism: Synthesis
CO2 + H2O H2CO3
Carbon Water Carbonic acid
Dioxide
Synthesis – “building up” reactions.

11. Types of Metabolism: Decomposition
H2CO CO2 + H2O
Carbonic acid Carbon Water
Dioxide
Decomposition – “breaking down” reactions.

12. Chemical Reactions

13. Disintegration
Mercury reacting to aluminum

14. Pharaoh's Serpent
Mercury reacting with oxygen

15. Decomposition
Potassium chlorate reacting with a gummy bear

16. Single Displacement
Iron reacting with copper sulfate

17. Fire Bottle
Alcohol reacting with oxygen

18. Instant Snow
Sodium Polyacrylate reacting with water

19. Elephant Toothpaste
Iodine reacting with hydrogen peroxide

20. STOP HERE!

21. Metabolism
Metabolism – all chemical reactions and changes that occur in a cell or organism.