Gas Law Used: Gay-Lussac's law says that the pressure of a gas is directly proportional to the kelvin temperature if the volume is held constant. In other words when the temperature goes up the pressure goes up and vise-versa. With our cannons the volume will be held constant because that canister's volume does not change. At time of ignition the hot splint will ignite the ethanol gas and the temperature in the canister will rise very quickly so the pressure has to do the same. This causes the nerf ball to be shot into the air.
How Does The Reaction Happen? The balanced chemical formula for this reaction is C2H5OH + 3O2 ® 2CO2 + 3H2O The CO2 in the reaction build pressure in the canister and causes the nerf ball to be shot from the cannon. Difficulties in Construction: Our group really didn't have any difficulties in the actual construction process since we had though out and sketched the design several times. We worked well together and I dont' think I would change anything about the way that we constructed our cannon.
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