Ozone Depletion Flashcards
(8 cards)
1
Q
Properties of CFC’s
A
Inert, non-toxic, non-flammable
2
Q
What products utilised CFC’s when they were still used?
A
Coolants in fridges
Solvents in dry cleaning
Propellants in aerosols
3
Q
What is one function of the ozone layer which protects organisms on earth?
A
It absorbs UV radiation
4
Q
Why are CFC’s dangerous to the ozone layer?
A
They go through homolytic fission and form Cl radicals
5
Q
What are the 2 equations showing how Cl radicals break down ozone
A
Cl radical + ozone -> ClO radical + oxygen
Cl radical + ozone -> 2 oxygen + Cl radical
6
Q
Overall equation showing how chlorine radicals break down ozone
A
2 ozone -> 3 oxygen
7
Q
What replaced CFC’s?
A
HFC’s
8
Q
Pro and con of HFC
A
Pro: Not as damaging to the ozone layer
Con: Contributes to global warming
