1. Combustion reactions
Things go boom

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

3. 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

4. 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.

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

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

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

8. 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.