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11 Cards in this Set
- Front
- Back
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Breaking down of ozone vs. breaking down of oxygen gas
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Ozone can be broken down by longer wavelengths than oxygen gas
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Example of a Hydroclorofluorocarbon
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Chlorodifluoromethane CHF(2)Cl
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Why are HClFCs only a temporary solution
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It reduces othe ozone layer due to the C - Cl bond in the molecule
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Ozone
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Pale-bluish gas with a pungent odour, very reactive
(powerful oxidizing agent) |
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Formation of O3
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O2+uv light->2.O/ O2+.O->O3
Photo-Dissociation of molecular O2 |
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where is O3 located
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stratosphere, 15-45 KM above earth's surface
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Ozone layer constantly:
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Formed and broken down (absorbs 99% of UV light from sun)
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CFC
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found in spray - chemically inert and contain Cl
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nitric oxide
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increase temp NO + O3 = NO2 +O2
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Ozone is being depleted by
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CFCs, Nitric Oxide
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Alternatives for CFCs
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Hydrocarbons, Hydrochlorofluocarbons, Fluorocarbons, Hydrofluorocarbons
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