Bottle rocket

Rocket engines are fundamentally different from petrol, steam or electric engines. Rocket engines are reaction engines based on famous Newtonian principle that "to every action there is an equal and opposite reaction." A rocket engine is throwing mass in one direction and benefiting from the reaction that occurs in the other direction as a result.

In above experiment we used methylated spirit that is intended for use as a fuel or solvent and typically contains 5% or more methanol. Methanol is flammable and has a boiling point close to that of ethanol. Methanol is absorbed across the skin and is highly toxic, so take extra care when dealing with it. The chemical equation for the combustion of methanol is:

2CH3OH + 3O2 = 2CO2 + 4H20