chapter 7.10 combustion reactions by shakara, carlee and alexis
TRANSCRIPT
Chapter 7.10Combustion Reactions
By Shakara, Carlee and Alexis
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 + O2 “oxide” + ENERGY
Hydrocarbon: organic compound consisting entirely of hydrogen and carbon
The 3 components in a combustion reaction
• Fuel• Oxygen (O2)• Heat
Example: When wood burns(fuel), O2 must be present and it produces heat and energy.
A Candle Burning
Two types of combustion
COMPLETE (Most Common)• Clean combustion with
a hydrocarbon produces carbon dioxide (CO2) and water
INCOMPLETE• Unclean combustion
with a hydrocarbon produces carbon and/or carbon monoxide (CO) as well as carbon dioxide (CO2)
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
Complete Reaction
CH4 + 2 O2
CO2 + 2 H2O + heatKeyBlue: HydrogenYellow: CarbonRed: Oxygen
Incomplete Reaction
CH3OH + O2 2H20 + CO +heat
KeyBlue: HydrogenYellow: CarbonRed: Oxygen
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
3. The three things needed for a combustion reaction is heat, helium and oxygen.
4. O2 is a must in a combustion reaction.
a. True b. False
a. Trueb. False
PQP Homework Question
Write a balanced equation for the complete combustion of each of these compounds.1. Ethanol, C2H5OH
2. Propane, C3H8