Environmental concerns of organohalogen compounds Flashcards
1
Q
how do CFCs deplete the ozone layer?
A
- UV radiation causes CFC’s to produce halogen radicals
- these radicals catalyse the breakdown of Earth’s protective ozone layer
2
Q
what other radicals are responsible for ozone depletion?
A
nitrogen oxide radicals
3
Q
write equations for the breakdown of CF2CL2
A
CF2Cl 2 → CF2Cl* + *Cl
*Cl + O3 → *ClO + O2
*ClO + O → *Cl + O2
4
Q
write an euqation to show how ozone is formed?
A
O2 –> (UV) O + O
O2 +O –> O3
5
Q
What are 3 useful properties of CFCs
A
- stable
- volatile
- non-flammable
6
Q
name 2 alternatives to CFCs
A
HCFCs + HFCs
hydrocarbons
