The following sections of this BookRags Literature Study Guide is offprint from Gale's For Students Series: Presenting Analysis, Context, and Criticism on Commonly Studied Works: Introduction, Author Biography, Plot Summary, Characters, Themes, Style, Historical Context, Critical Overview, Criticism and Critical Essays, Media Adaptations, Topics for Further Study, Compare & Contrast, What Do I Read Next?, For Further Study, and Sources.
(c)1998-2002; (c)2002 by Gale. Gale is an imprint of The Gale Group, Inc., a division of Thomson Learning, Inc. Gale and Design and Thomson Learning are trademarks used herein under license.
The following sections, if they exist, are offprint from Beacham's Encyclopedia of Popular Fiction: "Social Concerns", "Thematic Overview", "Techniques", "Literary Precedents", "Key Questions", "Related Titles", "Adaptations", "Related Web Sites". (c)1994-2005, by Walton Beacham.
The following sections, if they exist, are offprint from Beacham's Guide to Literature for Young Adults: "About the Author", "Overview", "Setting", "Literary Qualities", "Social Sensitivity", "Topics for Discussion", "Ideas for Reports and Papers". (c)1994-2005, by Walton Beacham.
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Ethene or ethylene is the simplest member of the alkene group. It has a chemical formula of CH2CH2, with a double bond between the two carbon atoms. Ethene is a colorless gas that can be collected from natural gas and crude oil. It is the most commonly manufactured organic chemical in the world. In the 1990s production of ethene in the United States totaled approximately 15 million metric tons. The majority of the manufacturing is from the catalytic cracking of ethane, petroleum fractions, and crude oil. Ethene also is obtained from ethanol and it can be readily converted back to ethanol by the addition of water in the presence of a catalyst or at high temperatures.
Ethene has a large number of commercial and industrial applications. When ethene is absorbed by a solution of potassium permanganate the anti-freeze ethylene glycol is produced. Polymerization at high pressures or in the presence of a catalyst can produce polythene. The United States produces over 6 million metric tons of this one plastic annually. Ethene also is used in the manufacture of polyvinyl chloride (PVC) and polystyrene, and ethene gas promotes the ripening of many fruits, such as apples and bananas.
In common with all unsaturated hydrocarbons hydrogen can be added across the double bond to produce ethane. When ethene is burned it does so with a luminous, sooty flame and when mixed with oxygen it can produce an explosive mixture.
Ethene is the most commonly manufactured organic chemical and it is then processed in various ways to make many of the plastics on which modern society depends.