Freon is DuPont's trade name for its odorless, colorless, nonflammable, and noncorrosive chlorofluorocarbon and hydrochlorofluorocarbon refrigerants, which are used in air conditioning and refrigeration systems. E I du Pont de Nemours and Company (,) is an American chemical company that was founded in July 1802 as a Gunpowder mill by Eleuthère Irénée The haloalkanes (also known as halogenoalkanes or alkyl halides) are a group of Chemical compounds consisting of Alkanes such as Methane The haloalkanes (also known as halogenoalkanes or alkyl halides) are a group of Chemical compounds consisting of Alkanes such as Methane A refrigerant is a compound used in a heat cycle that undergoes a Phase change from a Gas to a Liquid and back The term air conditioning refers to the cooling and dehumidification of indoor air for Thermal comfort. Refrigeration is the process of removing Heat from an enclosed space or from a substance and moving it to a place where it is unobjectionable

History

Freon was initially developed in the early 20th century as an alternative to the toxic gases that were previously used as refrigerants, such as ammonia, chloromethane, and sulfur dioxide. Ammonia is a compound with the formula N[[hydrogen H3]] It is normally encountered as a Gas with a characteristic pungent Odor Chloromethane, also called Methyl chloride, R-40 or HCC 40 is a Chemical compound of the group of Organic compounds called Haloalkanes. Freon, in this case dichlorodifluoromethane, was invented by Thomas Midgley, Jr. with co-inventor Charles Kettering. Thomas Midgley Jr ( May 18, 1889 – November 2, 1944) was an American mechanical engineer turned Chemist Charles Franklin Kettering ( August 29, 1876 – November 24 or November 25, 1958) was an American inventor and the holder of ^[1] Each Freon product is designated by a number; for instance, Freon-11 is trichlorofluoromethane, while Freon-12 is dichlorodifluoromethane. Trichlorofluoromethane also called freon-11, CFC-11, or R-11, is a Chlorofluorocarbon. Dichlorodifluoromethane ( R-12) usually sold under the Brand name Freon-12, is a Chlorofluorocarbon Halomethane, commonly known In the 1990s, most uses of Freon were phased out due to the negative effects that chlorofluorocarbons and hydrochlorofluorocarbons have on the Earth's ozone layer. The photochemical mechanisms that give rise to the ozone layer were worked out by the British physicist Sidney Chapman in 1930

Footnotes

See also

• Haloalkane, a group of chemical compounds
• List of refrigerants

The haloalkanes (also known as halogenoalkanes or alkyl halides) are a group of Chemical compounds consisting of Alkanes such as Methane Chemical Refrigerants are assigned an R number (sometimes the label replaces it with the word Freon which is determined systematically according to molecular structure

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