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Thread: Can water be turned into a pile of solid hydrogen and oxygen?

  1. #1 Can water be turned into a pile of solid hydrogen and oxygen? 
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    Hi, im trying to better understand the nitrogen cycle. (im a hard learner aswell.. i seem to learn best if i can visualise it in my head)

    anyways i was wondering is it possible? (turning water into a pile of solid hydrogen and oxygen hahah) sounds funny in a way but still
    thx!


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  3. #2  
    Brassica oleracea Strange's Avatar
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    Hydrogen and oxygen are gases under "normal" conditions. The melting point of oxygen is -218.79 C and the melting point of hydrogen is -259.14 C.

    However, water can be turned into hydrogen and oxygen gas. Most easily by passing an electric current through it (electrolysis).


    ei incumbit probatio qui dicit, non qui negat
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  4. #3  
    Genius Duck Dywyddyr's Avatar
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    Quote Originally Posted by PandaCory View Post
    anyways i was wondering is it possible? (turning water into a pile of solid hydrogen and oxygen hahah) sounds funny in a way but still
    Yes.
    It's called ice.
    If you mean separate piles of each you'd have to separate them first, then cool them, considerably.
    Oxygen.
    Hydrogen.
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    nice! but do we have a way of turning it back into water? or we just ridded ourselves of some water?
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    Brassica oleracea Strange's Avatar
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    Quote Originally Posted by PandaCory View Post
    nice! but do we have a way of turning it back into water?
    Light a match (and stand well back).
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    ei incumbit probatio qui dicit, non qui negat
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    so if i put some solid hydrogen and solid oxygen in a box and throw a lit match in it, i would have created water? (almost sounds like a magic trick lol)
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  8. #7  
    Genius Duck Dywyddyr's Avatar
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    Magic trick?
    It's actually called chemistry.
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  9. #8  
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    woudnt that be the purest form of water? i mean, someone somewhere must have a use for such water?
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    Quote Originally Posted by PandaCory View Post
    so if i put some solid hydrogen and solid oxygen in a box and throw a lit match in it, i would have created water? (almost sounds like a magic trick lol)
    The magic part would be surviving the conditions under which solid oxygen and solid hydrogen form long enough to light a match.
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  11. #10  
    Brassica oleracea Strange's Avatar
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    Liquid oxygen and liquid hydrogen are used as rocket fuel: Rocket propellant - Wikipedia, the free encyclopedia
    ei incumbit probatio qui dicit, non qui negat
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  12. #11  
    Genius Duck Dywyddyr's Avatar
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    Quote Originally Posted by PandaCory View Post
    woudnt that be the purest form of water?
    "Purest form"?
    Water is H20.
    If it's anything else it's water + extras.

    i mean, someone somewhere must have a use for such water?
    I discovered that it's useful for drinking.
    Raise the temperature to 100oC, add sucrose and ground coffea arabica (or coffea canephora) and it's very tasty.

    Here's a video of "magic" in action.
    Mr. Glane Chemistry Demo: Burning Hydrogen and Oxygen to make Water - YouTube
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  13. #12  
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    Quote Originally Posted by PandaCory View Post
    so if i put some solid hydrogen and solid oxygen in a box and throw a lit match in it, i would have created water? (almost sounds like a magic trick lol)
    Assuming there's anything left after the explosion, yes, you would have water.
    Its the way nature is!
    If you dont like it, go somewhere else....
    To another universe, where the rules are simpler
    Philosophically more pleasing, more psychologically easy
    Prof Richard Feynman (1979) .....

    Das ist nicht nur nicht richtig, es ist nicht einmal falsch!"
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  14. #13  
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    Quote Originally Posted by Strange View Post
    Quote Originally Posted by PandaCory View Post
    nice! but do we have a way of turning it back into water?
    Light a match (and stand well back).
    I have a question. If you add pure O2 and pure H2 together, would you really need a match to cause a reaction?
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    Genius Duck Dywyddyr's Avatar
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    Quote Originally Posted by Bad Robot View Post
    I have a question. If you add pure O2 and pure H2 together, would you really need a match to cause a reaction?
    Unless that bottle in the video I linked to actually exploded early on and the rest of the film was CGI'd then the answer is yes.
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    Quote Originally Posted by PhDemon View Post
    Yes, there is an activation energy barrier (you need to break the H-H bond in H2 to initiate the reaction).
    Seems to me that a small static spark would be very dangerous then and match not needed.
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    Quote Originally Posted by Dywyddyr View Post
    Quote Originally Posted by PandaCory View Post
    woudnt that be the purest form of water?
    "Purest form"?
    Water is H20.
    If it's anything else it's water + extras.

    i mean, someone somewhere must have a use for such water?
    I discovered that it's useful for drinking.
    Raise the temperature to 100oC, add sucrose and ground coffea arabica (or coffea canephora) and it's very tasty.

    Here's a video of "magic" in action.
    Mr. Glane Chemistry Demo: Burning Hydrogen and Oxygen to make Water - YouTube

    pretty sure drinking water isnt pure water
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  18. #17  
    Genius Duck Dywyddyr's Avatar
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    Quote Originally Posted by PandaCory View Post
    pretty sure drinking water isnt pure water
    Er...
    Quote Originally Posted by Me
    Water is H20.
    If it's anything else it's water + extras.
    "[Dywyddyr] makes a grumpy bastard like me seem like a happy go lucky scamp" - PhDemon
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  19. #18  
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    Quote Originally Posted by Bad Robot View Post
    I have a question. If you add pure O2 and pure H2 together, would you really need a match to cause a reaction?
    I believe you could instead add platinum black to the mixture at room temperature. When doing catalytic hydrogenations, it is standard practice the flush the reaction vessel with nitrogen, both before the hydrogen is introduced at the start of the reaction, and before the reaction vessel is opened to the air at the end of the reaction. If you forget...
    There are no paradoxes in relativity, just people's misunderstandings of it.
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  20. #19  
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    Heh, so far, a fun to read thread. I went on a "liking" spree.
    But it should carry a disclaimer of "Do not try this at home."
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