Combustion
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
Fuel + oxygen oxides + energy Word equation: Fuel + oxygen oxides + energy The energy is mainly in the form of heat and light Fuel can vary
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
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 C4H10 + 13 O2 8 CO2 + 10 H20
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
Class work and Homework Read textbook section on combustion Answer question on pg. 251 #1-7 Chapter Review pg. 258