Ozone depletion Flashcards
1
Q
What are CFCs
A
Chlorofluorocarbons that escaped into the atmosphere and depleted the ozone layer
2
Q
How is ozone formed
A
O2 and UV light
3
Q
How is ozone beneficial?
A
It absorbs ultraviolet radiation
4
Q
How are chlorine atoms formed in the upper atmosphere?
A
Chlorine atoms are formed in the upper atmosphere when ultraviolet radiation causes C–Cl bonds in chlorofluorocarbons (CFCs) to break.
5
Q
State the mechanism for ozone depletion
A
Initiation
Cl2 -> 2Cl.
Propagation
Cl. + O3 -> ClO. + O2
ClO. + O3 -> 2O2 + Cl.
Termination
2Cl. -> Cl2
6
Q
What were CFCs used as?
A
Aerosols and coolants in fridges
7
Q
A
