Chemistry of the Ozone Hole
¥
Chlorine atoms can be freed from
CFCÕs by UV reaction
¥
CCl
3
F + UV
¨
CCl
2
F + Cl
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CCl
2
F
2
+ UV
¨
CClF
2
+ Cl
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C
2
Cl
3
F
3
+ UV
¨
C
2
Cl
2
F
3
+ Cl
¥
Once a chlorine atom is freed, it can
destroy thousands of ozone
molecules before being removed
from the air
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Cl + O
3
¨
O
2
+
ClO
¥
ClO + O
¨
O
2
+
Cl
Moran and Morgan, Fig 2.19
CFC-11
