1. Combustion

2. Combustion is one category of reactions
Combustion is a very rapid reaction of a substance with oxygen to produce compounds called oxides
This process is often called burning

3. Fuel + oxygen oxides + energy
Word equation:
Fuel + oxygen oxides + energy
The energy is mainly in the form of heat and light
Fuel can vary

4. Most important (common) fuels we burn hydrocarbons
Eg. gasoline, natural gas, kerosene, candles
Hydrocarbons + oxygen carbon dioxide
+ water vapour
+ energy
The complete combustion of hydrocarbon
fuels produce millions of tonnes of water
and carbon dioxide, that are released into
the atmosphere

5. Example of hydrocarbon combustion
Butane, a gas at room temperature but a liquid under pressure
When butane escapes the lighter through a valve, a spark ignites it
2 C4H O CO H20

6. Incomplete combustion
Incomplete combustion occurs when there is not enough oxygen available
Instead of two products, four are formed
Carbon monoxide
Carbon
Carbon dioxide
Water
Carbon monoxide: is a poisonous gas that
combines with hemoglobin in the blood to starve
the body of oxygen and results in death

7. Class work and Homework
Read textbook section on combustion
Answer question on pg. 251 #1-7
Chapter Review pg. 258