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Photochemical smog is a type of air pollution produced when sunlight acts upon exhaust gases.
- Words:
- 839
- Submitted:
- Thu Sep 18 2003
Have a little read: ... Chemistry: Open-Book Paper Jason Horne Photochemical smog is a type of air pollution produced when sunlight acts upon exhaust gases (primary pollutants) to form harmful substances (secondary pollutants) such as ozone (O3), aldehydes and peroxyacetylnitrate (PAN). The exhaust gasses, or primary pollutants, are produced by combustion of fossil fuels; they include NOx, volatile organic compounds (VOC's) and CO. When the right frequency of sunlight acts on NO2 it can break apart and form highly oxidising radicals, these react to produce the secondary pollutants. The main primary pollutants created by a coal fired power station are NOx , SOx and VOC's. Sulphur oxides are created from the burning of the coal. Coal naturally contains sulphur, the amount of which varies depending on which organisms created the coal. When the coal is burnt, so also is the sulphur; S(s) + O2(g) -----> 2SO2 (g) Because sulphur oxides are so poisonous, the vast majority of
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