Thread: Combustion energy of acetone

Hi guys,

For science class I need to calculate the efficiency of my potato cannon.
(A potato cannon is a cannon used to shoot a potato, the energy for the launch is coming from the combustion of an evaporated fuel, in this case acetone)
I know how far the potato went, the launch angle... so I know how much energy was needed for that to happen.
For calculating the effinciency I need to know how much energy was totally created, because a lot of energy was 'spilled' under the form of heat and not used to accelarate the potato.
So bassically I need to know the energy created by the combustion of, let's say 1ml evaporated acetone under normal conditions and with enough oxigen.

Hope you all understand my question, and thanks in advance!
Scienceguy123