carbondioxide - Prof. Shakhashiri www.scifun.org General...

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Prof. Shakhashiri www.scifun.org General Chemistry CARBON DIOXIDE, CO 2 Carbon dioxide, CO 2 , is one of the gases in our atmosphere, being uniformly distributed over the earth's surface at a concentration of about 0.033% or 330 ppm. Commercially, CO 2 finds uses as a refriger- ant (dry ice is solid CO 2 ), in beverage carbonation, and in fire extinguishers. Because the concentration of carbon dioxide in the atmosphere is low, it is not practical to obtain the gas by extracting it from air. Most commercial carbon dioxide is recovered as a by-product of other processes, such as the production of ethanol by fermentation and the manufacture of ammonia. Some CO 2 is obtained from the combustion of coke or other carbon-containing fuels. C( coke ) + O 2 ( g ) xxv CO 2 ( g ) Carbon dioxide is released into our atmosphere when carbon-containing fossil fuels such as oil, natural gas, and coal are burned in air. As a result of the tremendous world-wide consumption of such fossil fuels, the amount of CO 2 in the atmosphere has increased over the past century, now rising at a rate of about 1 ppm per year. Major changes in global climate could result from a continued increase in CO 2 concentration. In addition to being a component of the atmosphere, carbon dioxide also dissolves in the water of
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This note was uploaded on 11/18/2011 for the course BI 107 taught by Professor Fuller during the Spring '08 term at Montgomery College.

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carbondioxide - Prof. Shakhashiri www.scifun.org General...

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