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Can we make water?

  1. Apr 26, 2009 #1
    can we make water??

    chemical formula of water is H2O
    hydrogen and oxygen are abundant in the atmosphere...so can we make water artificially by joining hydrogen and oxygen in the right quantity ?
     
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  3. Apr 26, 2009 #2

    Borek

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    Re: can we make water??

    Almost no hydrogen in the atmosphere.

    Yes, we can make water reacting hydrogen with oxygen.
     
  4. Apr 26, 2009 #3

    HallsofIvy

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    Re: can we make water??

    I make water every morning.
     
  5. Apr 26, 2009 #4

    Borek

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    Re: can we make water??

    No, you make it all the time, you just pass it at the morning :wink:
     
  6. Apr 26, 2009 #5
    Re: can we make water??

    Then why we are we not using this technology in places were water is less?
     
  7. Apr 26, 2009 #6

    DaveC426913

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    Re: can we make water??

    There is no free hydrogen on Earth. It is all already bound up in chemicals - mostly water. Hydrogen and oxygen react almost spontaneously to form water.
     
  8. Apr 26, 2009 #7
    Re: can we make water??

    Hydrogen and oxygen are very common elements to be found in rocks and minerals...so I think it would be at least technically possible to take a bunch of dry dirt and rocks in the desert and make water out of them. Of course, if this were easy to do, people would probably already be doing it.
     
  9. Apr 26, 2009 #8

    Borek

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    Re: can we make water??

    Technically it is possible, but it requires enormous amounts of energy and sophisticated technology. It will be cheaper to fly ice from Antarctic by blimps.
     
  10. Apr 26, 2009 #9
    Re: can we make water??

    It's even cheaper just waiting: in some tens of years global warming will deliver that ice to us gratis...:smile: :eek:
     
  11. Apr 26, 2009 #10
    Re: can we make water??

    Yeah you'll learn as you go on, just because you can do something doesn't mean it's practical enough to warrant doing it.
     
  12. Apr 27, 2009 #11

    chemisttree

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    Re: can we make water??

    http://www.army.com/blog/item/434" [Broken]

    We use hydrogen in the form of gasoline.

    C8H18 + 17O2 --------> 8CO2 + 9H2O
     
    Last edited by a moderator: May 4, 2017
  13. Apr 27, 2009 #12

    alxm

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    Re: can we make water??

    Actually there was an essay in Nature the other month about water shortages, and how it's not quite the problem its often made out to be. Countries with shortages of water compensate by importing food and using less water for agriculture.
     
  14. Apr 27, 2009 #13

    DaveC426913

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    Re: can we make water??

    So, disease from tainted water is not one of the primary causes of death in 3rd-world countries???
     
  15. Apr 27, 2009 #14

    Borek

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    Re: can we make water??

    It is known fact that people in these countries are rich enough to import food. That is especially true in Somalia coastline villages, where money falls from the low flying planes.
     
  16. Apr 27, 2009 #15

    DaveC426913

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    Re: can we make water??

    :tongue:

    Yes but that does not result in the conclusion that they do have fresh water to drink.
     
  17. Apr 27, 2009 #16

    russ_watters

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    Re: can we make water??

    Yes: "in rocks", meaning "not free".
    Exactly: since the oxygen and hydrogen isn't free, it requires a lot of energy to break it free from whatever chemical it is bound to, so it isn't easy.

    The atmosphere contains a very large amount of hydrogen and oxygen - but virtually all of the hydrogen is already bound to water. So the easiest way to create liquid water would be to simply condense it out of the air. Most affluent people in warm climates already do this, but they discard the water, dumping it on the street or down the drain. It is a waste product of air conditioning.
     
  18. Apr 27, 2009 #17

    alxm

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    Re: can we make water??

    It certainly is. The article was of course referring to more affluent, but water-poor places, such as the Arab nations.
    Which I kind of assumed was the context here as well, as providing water through 'chemical' means, be it desaliation or whatever, would generally be expensive and not an option for Somalia either.
     
  19. Apr 28, 2009 #18
    Re: can we make water??

    is this a cheaper way ? can we make large quantity of water using this technique?
     
    Last edited by a moderator: May 4, 2017
  20. Apr 28, 2009 #19

    Borek

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    Re: can we make water??

    Oh please, don't you see that to produce water here we are using octane - which is just an example of gasoline component? So in the effect you have to transport gasoline, burn it and reclaim water from the exhaust. It is not cheap.

    It can make sense when you already have to drive and burn gasoline, but it is not a way of making water.
     
  21. Apr 28, 2009 #20
    Re: can we make water??

    So we can't make water cheaply through chemical reactions..isn't it?
     
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