cfcs are halogenoalkanes they contain only chlorine, fluorine and carbon! all the hydrogen's...
TRANSCRIPT
CFCs and OzoneBy 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
Used in fridges, aerosols, air con and dry cleaning.
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.
OZONE
Is in a layer of the atmosphere called the Stratosphere
It contains most of the O3 molecules.
Ozone is formed when UV sunlight hits the oxygen molecules.
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!
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!
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!