Methanol is ignited to expel a rubber stopper.  


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Teachable Topics:


Theory:

Methanol is extremely flammable and will light quickly when ignited. When the tesla coil lends a spark to the gap inside the sealed rubber tube, the spark ignites the ethanol.

The methanol ignites in the air and undergoes the following chemical reaction:

 

This reaction increases the temperature of the gas in the tube, as well as number of moles. Before the reaction, there are 5 moles of gas, while there are 6 moles after the reaction. The reaction is exothermic and so releases energy, thus generating heat. 

This increases the pressure in the tube such that it blows the top off, firing it far across the room.  

This is the same principle behind combustion in a car’s engine.


Apparatus:


Procedure:


SAFETY

You must wear safety glasses while performing this experiment.  Please ensure all safety protocols are followed.  This experiment should not be performed alone.