COMBUSTION
                  Often: hydrocarbon + 02 = C02 + H2O
Burn methane in a jar
Making and burning of Acetylene  
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Burning methane to make                    
          an explosion.                              
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Light a bag filled with methane
Light bag filled with methane and air
Light a bag filled with 1 vol of methane
and 2 volumes of pure oxygen
Exploding a jar of air and         
         methanol