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Chemistry

Open book paper: Chemistry


In the terms of production of photochemical smog, primary pollutants are the chemicals that are released directly into the atmosphere e.g. emissions from car exhausts or waste products from coal power stations, which are harmful to the environment. Secondary pollutants are formed when primary pollutants undergo further reactions and are also harmful to our environment.
There are two main types of primary pollutants in photochemical smog, oxides of nitrogen (NO and NO2) called NOx and volatile organic compounds called VOCs (mostly hydrocarbons).

Pollutants of photochemical smog:

(Picture from DF5. CS p 34) (List of all polutants primary and secondary)

Cars emit CO2, CO, H2O, CxHy, SOx, N2, and NOx. Many of these products are primary and secondary pollutants in photochemical smog.

Coal-fired power stations release colossal amounts of primary pollutants, the main ones are Sulphur oxides and nitrogen oxides.
Sulphur oxides are a prod...

Posted by: Sylvia Schiavoni

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