You can't burn water, because it's already burnt
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
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.
Furthermore, you can burn water with a strong enough oxidizer. Oxygen, despite lending its name to the word "oxidize", is not the best oxidizer out there. That belongs to things with fluorine in it. You can burn water with pure fluorine gas to produce hydrogen fluoride and oxygen.
Don't try this at home. Both fluorine and the resulting HF is deadky.
HF is itself a super nasty piece of work -- a deadly acid that seeps through your skin and kills you from the inside.
The fun part about that: you can burn hydrogen with fluorine because fluorine is the best oxidizer; it's then deadly (and caustic) because hydrogen is not the best reducer - it's both an oxidizer and a reducer and, as a result, it's basically middle-of-the-road for both properties. Specifically, most metals are better. So the HF will happily drop its hydrogen for many metals to oxidize (fluoridate) them instead. Lead, iron, zinc, aluminum, magnesium, and lithium will each make a way more stable fluoride than does hydrogen.
In solution (say, if you inhale HF, it'll dissolve into the moisture in your lungs), it breaks apart into H⁺ and F⁻ ions - both of which are just straight-up electrochemically promiscuous. The pair'll run through your lungs breaking up organic bonds like couples at an orgy.
Even so, HF doesn't hold a candle in terms of danger (and oxidation potential) compared to fluorine peroxide / dioxygen difluoride / FOOF.
There's always a lower energy state
Flourine by itself is nothing compared to chlorine triflouride (CTF) though.
There were some ideas to use it in rockets, but, as John D. Clark put it:
It is, of course, extremely toxic, but that's the least of the problem. It is hypergolic with every known fuel, and so rapidly hypergolic that no ignition delay has ever been measured. It is also hypergolic with such things as cloth, wood, and test engineers, not to mention asbestos, sand, and water—with which it reacts explosively. It can be kept in some of the ordinary structural metals—steel, copper, aluminum, etc.—because of the formation of a thin film of insoluble metal fluoride that protects the bulk of the metal, just as the invisible coat of oxide on aluminum keeps it from burning up in the atmosphere. If, however, this coat is melted or scrubbed off, and has no chance to reform, the operator is confronted with the problem of coping with a metal-fluorine fire. For dealing with this situation, I have always recommended a good pair of running shoes.
There were a few successful test fires with a CTF rocket on the ground, but to avoid explosions they had go through an elaborate multiple hour long cleaning procedure, and it ended up being too expensive and dangerous.
Magnesium fire has entered the chat
Reddit hasn't had a quality shower thought like this on the front page in years. Well done fediverse.
Any time I tried to post a shower thought on Reddit it was deleted because it either was posted previously (at any point in time, even if it was years ago) or was posted somewhere else online, not just Reddit, also at any point in time.
Nuts.
I might actually have to subscribe. I'm so used to avoiding the "default subs"
For what it's worth, half of them are essentially 'water is wet'. Although as far as thoughts in the shower go, I guess that's fairly reasonable.
I've seen a few great ones lately, but I've also been seeing a ton from people who don't understand the concept very well. Things like "it's not nice to be mean to people" or "there are more countries in Asia than China, Japan, and South Korea." I can't really say much as I haven't posted anything myself, but c'mon people!
I guess that makes water Hydrogen rust...
More like hydrogen ash
Next time it snows, remember: you're being gently coated in stellar ash.
I like this one. ⛷️
Golden shower, twice removed.
Water is also hydrogen and oxygen floating around in a sea where they are constantly switching partners. An orgy if you will.
That's why you're called a seaman when you go out floating in the ocean.
So, I'm no chemist, but if H2O is already oxidized, what do you call it when you make hydrogen peroxide - H2O2?
You call that an unstable compound that doesn’t want to exist. Hydrogen peroxide is constantly looking for an excuse to decompose back into water and oxygen. Making it is like rolling a barrel uphill. As soon as you let go, the barrel will roll back down to the bottom of the valley.
It’s like rolling a barrel up a bumpy hill.
The oxygen atom in a water molecule has an oxidation number of -2 (which is as reduced as it can get in common compounds you’re likely to find, and it has no reason to react further). In hydrogen peroxide, the oxygen atoms have an oxidation number of -1, so not quite as reduced as oxygen would rather be (which is why H2O2 is gonna oxidize whatever is around it. Those oxygen atoms are gonna get those sweet, sweet electrons one way or the other by god!)
The hydrogen atoms are identical between H2O and H2O2; that’s not where the magic happens, so to speak.
Super oxidized?
Checkmate, chemists!
Per - a prefix meaning perfect, thoroughly, or completely.
DiHydrogen Dioxide?
Entropy's a removed.
Did you try to burn the water while showering?
Yes, but the fire went out somehow and then I couldn't start it again.
So what would you call it when you combust water by exposing it to burning metals like magnesium?
Honest question. Isn't the metal combusting at that point?
Both contribute to the combustion, but it's the metal that's fuelling it while water plays the role that air/oxygen usually would. I think codyslab did a video where he had a flame fed by air in an atmosphere of methane which demonstrates the concept that actually you need both fuel and oxidiser for the flame, and one "burns" in an "inert" atmosphere of the other