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21 Cards in this Set
- Front
- Back
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Resonance structure of ozone
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2 pi bonds
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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
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Formation of O3
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O2+uv light->2.O/ O2+.O->O3
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where is O3 located
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stratosphere, 15-45 KM above earth's surface
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describe 03
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pale bluish gas with a pungent odor
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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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formation of O3
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photo-dissociation of molecular O2
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CFC
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found in spray - chemically inert and contain Cl
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Ozone bonding
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O = O- O
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nitric oxide
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increase temp NO + O3 = NO2 +O2
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How does ozone act as a shield
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absorbs 99% of the sun's harmful uv light
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Ozone formula and place in atmosphere
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O3, stratosphere
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Properties
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pale bluish gas, acrid odor, very reactive (powerful oxidizing agent)
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Ozone layer
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15-45 km above Earth's surface
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Formation of Ozone
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photodissociation of molecular oxygen by uv light : O2 + uv --> 2 (dot)O ... O2 + (dot)O --> O3
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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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oxygen radicals forming O2 gas formula
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O3(g) + O(g) --> 2O2 (g)
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