4.2.2 Haloalkane and enviro. Flashcards
1
Q
where is the ozone layer
A
10-40km above the earths surface
2
Q
job of ozone layer
A
to remove and filter out harmul UV light which causes skin cancer
3
Q
formation of O3
A
O2 -> 2O (molecule -> radicals)
O2+O -> O3 (molecule + radical)
4
Q
what are CFC and name uses of it
A
Chloro Fluoro Carbon
refigerantes, air conditioning and aerosoles
5
Q
why are CFC bad for ozone
A
they are stable (due to C-H bonds) till they reach ozone layer but once there it breaks up and forms Cl radicals which interupt formation of O3
6
Q
process from CF2Cl2 to O2
A
CF2Cl2 -> CF2Cl* + Cl*
Cl* + O3 -> ClO* + O2*
ClO* + O -> Cl* + O2
overall = O3 + O -> 2O2
7
Q
how are NO* made?
A
from lightening strikes or aircraft engines
8
Q
NO mechanism to form 2O2
A
NO* + O3 -> NO2* + O2
NO2* + O -> NO* + O2
overall = O3 + O -> 2O2.
