Chloroflourocarbons

Chloroflourocarbons were discovered in the 1920s by Thomas Midgley, an organic anovulant roller at General Motors Corporation. He was looking for inert, non-toxic, non-flammable compounds with moo boiling points that could be mathematical functiond as refrigeratings. He accommodate what he was looking for in the form of two compounds: dichlorodifluoromethane (chlorofluorocarbon-12) and trichloromonoflouromethane (CFC-11). In some(prenominal) compounds, different amounts of chlorine and fluorine are combined with methane, which is a combination of carbon and hydrogen. These two CFCs were eventually manufactured by E.I. du Pont de Nemours and company, and, under the trade name freon, constituted 15% of the market place store for refrigerator gases.         CFCs were the perfect answer for cooling refrigerators and oxygenise conditioners. They were slowly turned into liquid at room temperature with employment of moreover a small amount of pressure, and they could easily then be turned back into gas. CFCs were completely inert and non pestilential to humans. They became ideal solvents for industrial solutions and hospital sterilants. Another use found for them was to blow liquid plastic into various kinds of foams.         In the 1930s, phratry insecticides were bulky and hard to use, so CFCs were created because they could be unploughed in liquid form and in an nevertheless meagerly pressurized can. Thus, in 1947, the sprinkle can was born, selling millions of cans each year.

Insecticides were only the first of all application for CFC spray cans. They shortly employed a outlet of products from deodorant to h air spray. In 1954, 188 million cans were ! exchange in the U.S. alone, and four years later, the number jumped to 500 million. CFC filled cans were so popular that, by 1968, 2.3 billion spray cans were sold in America.         The hopes of a evidently perfect refrigerant were diminished in the late 1960s when scientists canvass the decomposition of CFCs in the... If you want to get a right essay, order it on our website: OrderEssay.net

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