this post was submitted on 28 Oct 2025
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What about chemicals that create their own oxygen source when burning?
The reaction propagation is always from the ignition source to the media, so the 'fire' is always on the outside. Even if the inside is in the process of quickly becoming the outside.
No, I get that. Not why I asked the question.
If you have a compound like potassium super oxide chatch light in a vacuum, does it still burn because it has it's own oxidizer?
Yes, that is how rockets get to space, for example. Earth's atmo is ~21% Oxygen. So that is giving flames a boost. Careful not conflate "burn" with the presence of flames. In a vacuum, the flame could only exist briefly because there isnt the available Oxygen from the air. The reaction will (or might?) still happen, but without the oxygen to produce a flame.
BTW, this has been studied in microgravity aboard the ISS.