this post was submitted on 07 Aug 2023
377 points (91.6% liked)

Showerthoughts

29325 readers
1 users here now

A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.

Rules

founded 1 year ago
MODERATORS
 

Fire is the rapid oxidation of a material. Water is 2 hydrogen and 1 oxygen. Every molecule is fully oxidized. It's also a common byproduct of fire. Therefore, you can't burn it, because it's already burnt

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 101 points 1 year ago (16 children)

Oh man... Wait until you hear about fires hot enough that if you put water on then, it breaks the water molecule and the hydrogen molecules cause an explosion.

Look up class D fires.

[–] [email protected] 7 points 1 year ago (2 children)

Ah so it's hot enough to electrolyze water and then when the hydrogen and oxygen gas move out of that heat zone, they're still in a hot enough area to re-oxidize into water, burning the hydrogen. Neat.

[–] [email protected] 2 points 1 year ago (1 children)

Nothing about this makes sense. Is it reoxidizing or burning?

[–] Fordiman 6 points 1 year ago

Yes.

Not only will metal fires break apart the water into oxygen and hydrogen, but they will consume the oxygen, as the metal oxide is a more stable energy state than is water. So you end up with a billow of hydrogen coming off the fire that mixes with the oxygen just above (because lighter gases rise) the oxygen-depleted zone of the fire, and it combusts there.

load more comments (13 replies)