A well known experiment is spraying isopropyl alcohol in a clear bottle and igniting the vapours making a rocket-like effect. But you may not have seen it in slow motion at 240FPS. I sprayed flammable 2-propanol (isopropyl alcohol) into a bottle and ignited the vapours inside to make a nice jet of flames. Although it is spectacular in real time, the effect is amplified when the footage is slowed down. Here is the result filmed in slow motion at 240 frames per second (10 times slower than real life). It is a beautiful effect and some of the best footage I have taken. The flame front of the igniting 2-propanol vapours is clearly visible travelling down the bottle.
The chemical equation for the reaction is:
2(CH₃)₂CHOH (g) +9O₂ (g) → 6CO₂ (g) +8H₂O (g)
The hot exhaust gases expand to high pressures which force the flame out of the bottle which is a loose demonstration of rocket thrust.
The camera was an iPhone 6 (not mine). I was quite impressed with the quality of the camera.
Post time: Feb-09-2017