Specification Point 4.23:
Know that Alkenes contain the function group C=C
Alkenes: A homologous series of hydrocarbon compounds with carbon-carbon double bonds (C = C)
Function Group of Alkenes
All alkenes will contain a double carbon bond, which is shown as two lines between two of the carbon atoms. The presence of this double bond allows alkenes to react in ways that alkanes cannot.
Specification Point 4.24:
Know the general formula for Alkenes
Alkenes General Formula
n = number of carbon atoms CnH2n
Specification Point 4.25:
Explain why alkenes are classified as unsaturated hydrocarbons
Classification of Alkenes
Alkenes: A homologous series of hydrocarbon compounds with double carbon bonds that has the general formula CnH2n
Alkenes are classified as unsaturated hydrocarbons as they contain a double covalent bond. See examples above.
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Jamie got a First class degree in Chemistry from Oxford University before going on to teach chemistry full time as a professional tutor. He’s put together these handy revision notes to match the Edexcel IGCSE Chemistry specification so you can learn exactly what you need to know for your exams.
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