Dropping a match into liquid oxygen



So today, I’m going to be making some liquid oxygen. Oxygen is normally a gas, but it can be turned into a liquid using liquid nitrogen. It’s a bit hard to see, but liquid oxygen is faintly blue. This is very dangerous, but what’s fun to do, is to throw a match into it. As a liquid, oxygen is an even more powerful oxidizer and it can sometimes react explosively.

WARNING: Liquid oxygen is extremely dangerous. It’s an extremely strong oxidizer and can react explosively.

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48 Comments

  1. I still remember in 5th grade science class, a guy from NASA demonstrated this in reverse. He had some cotton in a beaker, soaked in alcohol. He lit the cotton, then stood on a step ladder and drizzled in liquid oxygen from about 4 feet up. A rocket flame shot out about 3 feet, and it roared like a little rocket engine! "…and that's how rocket engines work!" I will NEVER forget that demo! This was a couple of years before Apollo 11, so interest was high. 🙂

  2. And do you know what that small part of the match head consists of that you poured out? It consists of molten glass bound together with potassium chloride slag. I'll take my more than 17,000 likes now which is how much the top comment here got for simply saying they like that it's blue. Thanks.

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