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Ozone hole stable?

Discussion in 'Alley of Dangerous Angles' started by Carcaroth, Aug 24, 2006.

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  1. Bassil Warbone Gems: 12/31
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    Does anyone know how long there has been a hole in the ozone layer?
     
    Bassil Warbone, Aug 30, 2006
    #21

  2. shadow lurker Gems: 17/31
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    Geh, I just learnt about ozone and CFC's in Chem last month...-_-;; Anyway, this is just the basics...

    CFC's were replaced by HCFC's and HFC's because the destructive chlorine free radical depletes the ozone layer and continously replenishes itself...see:

    edit: something went wrong with the equations...
    edit again: I give up, it won't work...

    CCl F --> CClF + Cl
    2

    Cl + O --> ClO + O
    3 2

    ClO + O --> Cl + O
    2

    (sorry couldn't put little numbers in or the dot above the Cl)

    HCFC's and HCF's both have hydrogen which allows them to react with OH- ions in the atmosphere so they mostly break up before they get to the stratosphere. HCF's are better than HCFC's because HCFC's still contain chlorine, but HFC's don't. However both are still greenhouse gases.

    Hmmm I have no idea if any of that was helpful to anyone...but anyway...
     
    shadow lurker, Aug 31, 2006
    #22
  3. Aldeth the Foppish Idiot

    Aldeth the Foppish Idiot Armed with My Mallet O' Thinking Veteran

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    As a chemist I know what you mean, but where you have the subscripts is nowhere near where they should be. Let adjust a bit shall we?

    Is much more reasonably presented as:

    CCl2 + F- --> CClF + Cl-

    Cl- + O3 --> ClO + O2

    ClO + O2 --> Cl- + O3

    However, that last equation is superfulous, as it's the reverse of the second equation, and all chemical reactions are assumed to be in some sort of equillibrium anyway. (In the vernacular, that means if a reaction can go in one direction, indicated by the arrow, the reverse reaction can also take place if enough energy is present.)
     
    Aldeth the Foppish Idiot, Aug 31, 2006
    #23

  4. shadow lurker Gems: 17/31
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    True, didn't think of writing it that way. Although there is a *slight* difference in the last equation. There's no ozone molecule in the last equation, it's oxygen. ;)
     
    shadow lurker, Sep 1, 2006
    #24
  5. Aldeth the Foppish Idiot

    Aldeth the Foppish Idiot Armed with My Mallet O' Thinking Veteran

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    Unless you're doing theoretical chemistry that allows for reactions with monoatomic oxygen, it's ozone. There's no such things as just O. Oxygen does not exist as a free atom - it either has to bond with itself, or with something else. So in that last equation, the only way you could end up with O2 as the product is if the first O was an oxygen atom, which is impossible. Even if they are implying that there are two oxygen ions, that would still require diatomic oxygen initially. The first O has to be diatomic oxygen, O2, meaning the result is ozone, O3.
     
    Aldeth the Foppish Idiot, Sep 1, 2006
    #25

  6. shadow lurker Gems: 17/31
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    Well I am actually just doing theory and other textbook work at the moment so I just get taught the simple stuff. However I get what you mean.
     
    shadow lurker, Sep 4, 2006
    #26
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