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Topic 2.2: Organic chemistry I (introduction, alkanes, alkenes, halogenoalkanes and alcohols) e). Applied organic chemistry i) the advantage and disadvantages of liquid and gaseous fuels e). Applied organic chemistry ii) the structures and properties of the polymers of simple alkanes and their uses Polymerisation occurs when a large number of small molecules (monomers) combine with a large number of small molecules(polymer). Alkanes (and their derivatives) are used to form synthetic polymers. The high density polymer is tougher and denser because it is more crystalline. Ethane polymerize to poly (ethane) or 'polythene'. It is a polymer, a very large molecule. It is made form single unit by a process of addition. [CH2 - CH2] n is called the repeating unit. Polythene is a plastic material which is in everyday use for different purposes like film packing, electrical insulation and container for household chemicals. It is a very important industrial application of alkanes. Propene...

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