Combustion reactions Things go boom

Whoosh Jug - Combustion! Reactants Products C3H7OH (l) + O2 (g) -----> CO2 (g) + H2O (g) Carbon Dioxide Water gas Vapor Hydrocarbon

Combustion reaction A substance combines with O2 releasing energy in the form of light and heat 2H2(g)+O2(g)→H2O(g) - hydrogen gas going boom C3H8+5O2→3CO2+4H2O - propane going boom When hydrocarbons combust they release CO2, H2O , & Heat (&/or) Light

Is similar to Redox (next week) The oxygen is so electronegative it pulls electron density away from the fuel, leading to an oxidation of the fuel. Oxidation means loses electrons, reduction means gains electrons.

Combustion reaction- triangle Need: -Fuel -Oxygen gas - Heat FOR COMBUSTION TO OCCUR

Typical combustion reaction Hydrocarbon combustion Equation Heat + CxHy+ O2 --> CO2 + H2O + heat Carbon Dioxide Water gas Vapor Hydrocarbon Oxygen

Inorganic combustion reaction (Key - Oxygen is in reactants) 2Mg + O2 → 2MgO+Heat This is how rust forms! Metal Oxide Metal

Summarize Explosions occur because a chemical reaction called combustion has taken place. In combustion, oxygen reacts with a substance such as fuel. The process of rusting, in which iron oxide in a metal reacts with oxygen from the air, is an example of slow combustion. Rapid combustion results when there is a rapid release of heat. If the release of heat and gas is extremely rapid, and the gas cannot dissipate quickly enough, then extremely rapid combustion and explosions occur.