Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hey,

    I'm having a bit of trouble understanding how CFCs actually destroy the ozone layer.

    I understand that the C-Cl bond in CFC breaks homolytically with absorption of a photon of UV wavelenght (of sunlight), giving rise to the chlorine free radical: Cl*. This then acts as a homogeneous catalyst...

    ...But how? What reactions does it catalyse?

    I'm guessing that the overall outcome is...

    2O3 --> 3O2

    (or should that be O3 + O* --> O2 + *O2 ?)

    ... but how is Cl* involved and what free radical intermediates (if any) are formed in the process?

    Does it go as follows?

    Cl* + O3 --> ClO + *O2
    ClO + O* --> Cl* + O2
    Offline

    19
    Cl* + O3 --> ClO* + O2
    ClO* + O3 --> Cl* + 2O2
    • Thread Starter
    Offline

    0
    ReputationRep:
    Thank you!
    Offline

    19
    (Original post by Harry1W)
    Thank you!
    no problem
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: September 4, 2008

University open days

  • University of Lincoln
    Mini Open Day at the Brayford Campus Undergraduate
    Wed, 19 Dec '18
  • University of East Anglia
    UEA Mini Open Day Undergraduate
    Fri, 4 Jan '19
  • Bournemouth University
    Undergraduate Mini Open Day Undergraduate
    Wed, 9 Jan '19
Poll
Were you ever put in isolation at school?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.