Ozone a lot of fuss over O3

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Ozone a lot of fuss over O3

• Made by that most free of free radicals-
• Jon Ratcliffe

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Just another molecule?
Ozone is a molecule made up of three oxygen in
difference to dioxygen molecules.
Ozone has an bond length and enthalpy between a
single and a double oxygen bond.
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So why is this molecule special?
This is a special molecule as it absorbs light in
the part of light spectrum most harmful to us
12-14 Hz and re-releases the light in a safe wave
length.
This means that the ozone in the upper atmosphere
is acting like a natural sunscreen. This stops us
from going like a redcurrant.
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How do you make it.
The ozone is created when a dioxide molecule
reacts with a oxygen free radical.
.
Note that this is an equilibrium reaction. Ozone
is created at the same rate as it is destroyed.
a free radical is a single atom of an element
that is usually in covalent bond with another
atom of the same element. It is given the symbol
X.
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What effects does pollution have on it?
The use of cfcs (chlorofluorocarbons) as
refrigerants and propellants cause the release of
chlorine free radicals.
The chlorine free radicals are more reactive than
the oxygen and so takes its place. This causes
the ozone layer to thin and holes to appear. This
increases the amount of sun related diseases and
causes people to have to protect themselves with
sunscreens and clothes.
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The hole in the layer

• The hole in the ozone layer is where pollutants
  in the atmosphere are thinning the ozone layer.
• The hole in the ozone layer is just above the
  Antarctic.
• It will and is causing the Antarctic ice sheets
  to melt.

• This will cause sea levels to rise and climatic
  changes

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Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
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Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
9
Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
10
Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
11
Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
12
Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
13
Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
14
Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
15
Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
16
Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
17
Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
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Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
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Photo dissociation
Photo dissociation is where photons of light
cause the compounds to react. How this works is
that the light gives the atoms in the compound
energy.
.
.
The atoms split up and react with some thing else
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How fast is ozone depleting.
The graph on the left shows the level of ozone
above the Halley base in antartica.
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What do we replace cfcs with.

• Scientists are looking for replacements For cfcs
  but they need a chemical with the right boiling
  points.
• They are looking at cfccs.