2. Chapter 7.10 Combustion Reactions By Shakara, Carlee and Alexis

3. What is a combustion reaction? Combustion reaction is a reaction in which oxygen reacts with another element or compound (generally a hydrocarbon) to produce energy in the form of heat and light Element + O 2 “oxide” + ENERGY Hydrocarbon: organic compound consisting entirely of hydrogen and carbon

4. The 3 components in a combustion reaction Fuel Oxygen (O 2 ) Heat Example: When wood burns(fuel), O 2 must be present and it produces heat and energy.

5. A Candle Burning

6. Two types of combustion COMPLETE (Most Common) Clean combustion with a hydrocarbon produces carbon dioxide (CO 2 ) and water INCOMPLETE Unclean combustion with a hydrocarbon produces carbon and/or carbon monoxide (CO) as well as carbon dioxide (CO 2 )

7. Balancing Equation Review In every balanced equation, each side of the equation has the same number of atoms of each element. Balance Carbon and Hydrogen FIRST Balance Oxygen LAST

8. Complete Reaction CH 4 + 2 O 2 CO 2 + 2 H 2 O + heat Key Blue: Hydrogen Yellow: Carbon Red: Oxygen

9. Incomplete Reaction CH 3 OH + O 2 2H 2 0 + CO +heat Key Blue: Hydrogen Yellow: Carbon Red: Oxygen

10. True or False? 1. Complete combustion is when carbon dioxide and water is formed. a. True b. False 2. An incomplete combustion is the most common. a. True b. False

11. 3. The three things needed for a combustion reaction is heat, helium and oxygen. 4. O 2 is a must in a combustion reaction. a. True b. False a. True b. False

12. PQP Homework Question Write a balanced equation for the complete combustion of each of these compounds. 1.Ethanol, C 2 H 5 OH 2.Propane, C 3 H 8