1. Reaction Types Combustion Reactions

2. “ The Blow Up ” – Matter reacts with O 2 to produce a new product(s) and releases energy. Reactants = 2 (One MUST be O 2 ) Products = This can vary

3. Combustion Reactions Fe (s) + O 2 (g) FeO (s) Or 4Fe (s) + 3 O 2 (g) 2 Fe 2 O 3 (s)

4. Combustion Reactions Special Case: Hydrocarbon + O 2 A hydrocarbon is an compound that contains at least C and H Examples include: CH 4 C 2 H 5 OH CH 3 COOH

5. Combustion Reactions When hydrocarbons are combusted, they always produce the same two products. CO 2 carbon dioxide H 2 O water

6. Combustion Reactions Example: CH 4 + O 2 CO 2 + H 2 O CH 4 + 2O 2 CO 2 + 2H 2 O

7. Combustion Reactions Be careful when you are in the lab …… Heating = Burning Heating means:  Burning means: + O 2 (g)

8. When writing net ionic equations Keep in mind that molecular compounds do not break into ions –Molecular compounds are composed of all nonmetals H 2 O CO 2 CH 4 C 3 H 7 OH and many others.