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CFCs and Ozone

CFCs and Ozone. By Peter Sawyer. CFCs Breakdown. CFCs are Halogenoalkanes They contain only Chlorine, fluorine and carbon! All the hydrogen's have been replaced. CFCs Breakdown. Very stable due to the CARBON-HALOGEN bonds. CFCs properties . VERY stable Volatile Non-flammable Non-toxic

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CFCs and Ozone

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  1. CFCs and Ozone By Peter Sawyer

  2. CFCs Breakdown • CFCs are Halogenoalkanes • They contain only Chlorine, fluorine and carbon! • All the hydrogen's have been replaced.

  3. CFCs Breakdown • Very stable due to the CARBON-HALOGEN bonds

  4. CFCs properties • VERY stable • Volatile • Non-flammable • Non-toxic • Used in fridges, aerosols, air con and dry cleaning.

  5. Alternatives to CFCs • HCFCs or Hydrochloroflurocarbons • HFCs or Hydrofluorocarbons • These are used as temporary alternatives to CFCs until safer products are found • HCFC still breaks down OZONE but in smaller amounts. They are broken down after 10-20 years. • HFCs are broken down in the atmosphere but don’t contain chlorine so don’t effect the OZONE.

  6. OZONE • Is in a layer of the atmosphere called the Stratosphere • It contains most of the O3molecules. • Ozone is formed when UV sunlight hits the oxygen molecules.

  7. Ozone • If the correct amount of UV light hits a oxygen molecule, it splits into free radicals. The free radicals combine with other oxygen to form OZONE. • CFCs absorb UV radiation and spilt to form chlorine free radicals. These free radicals then destroy OZONE, then regenerate and destroy even more!

  8. Ozone • 1 Chorine Atom can destroy 10000 ozone molecules before becoming stable! • Nitrogen oxides free radicals can also destory the ozone. This is produced from planes and car fumes. It effects the ozone in the same way as CFCs. • These are not the only ones!

  9. Ozone • If the correct amount of UV light hits a oxygen molecule, it splits into free radicals. The free radicals combine with other oxygen to form OZONE. • CFCs absorb UV radiation and spilt to form chlorine free radicals. These free radicals then destroy OZONE, then regenerate and destroy even more!

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