C7: Alkanes, Alkenes and Alcohol

Mind Map by , created over 6 years ago

Chemistry (C7: Alkanes, Alkenes and Alcohols) Mind Map on C7: Alkanes, Alkenes and Alcohol, created by jamiemcparlin on 05/11/2013.

Created by jamiemcparlin over 6 years ago
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C7: Alkanes, Alkenes and Alcohols Quiz
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C7: Alkanes, Alkenes and Alcohol
1 Alkanes
1.1 A group of hydrocarbons
1.1.1 In this group atoms are joined together by single carbon-carbon bonds
1.2 Are saturated carbons
1.2.1 This is because they contain only single bonds and can't make anymore
1.3 Do not react well with aqueous solutions
1.3.1 The C-C and C-H bonds are too strong and unreactive
1.3.2 They burn well in plenty of air to produce carbon dioxide and water An example of a balanced equation of combustion of an Alkane would be: C3H8 + 5O2 = 3CO2 + 4H2O CH4+ 2O2 = CO2 + 2H2O
1.4 The general formula for an alkane is CnH(2n+2) where "n" is the number of carbon atoms
1.4.1 Methane CH4
1.4.2 Ethane C2H6
1.4.3 Propane C3H8
1.4.4 Butane C4H10
2 Alkenes
2.1 A group of hydrocarbons
2.1.1 Their atoms are joined together in reactive C=C bonds
2.2 they are unsaturated because the atoms can stil react
2.3 The general fomula for Alkenes is CnH(2n^3) Where "n" is the number of carbon atoms
2.3.1 Methene CH8
2.3.2 Ethene C2H64
2.3.3 Propene C3H216
2.3.4 Butene C4H512
3 Alcohols
3.1 Characteristics are due to their functional group -OH
3.2 The general formula for Alcohols is CnH(2n+1)OH where "n" is the number of carbon atoms
3.2.1 Methanol CH3OH Can be used as: Chemical feedstock Cosmetics manufacturing
3.2.2 The two simplest alcohols are methanol and ethanol.
3.2.3 Ethanol C2H5OH Can be used as: A solvent A fuel
3.3 Properties of alcohols are different depending on their structure
3.3.1 Short alcoholshave low boiling points because the intermolecular forces are weak
3.3.2 Longer hydrocarbons behave like an alkane. They are less soluble on water and float due to their low density
4 Alcohol Reactions
4.1 Alcohol reacts with sodium to produce a Salt and hydrogen gas
4.1.1 Ethanol + Sodium = Sodium Ethoxide + Hydrogen 2C3H5OH + 2Na = 2C2H5O-Na+ + H2
4.1.2 Alcohols, water and alkanes react differently with Sodium In Alcohol, sodium sinks, doesn't melt and steadily gives of Hydrogen gas There is no reaction between sodium and Alkane In water sodium melts, fizzes and whizzes round on the surface, rapidly giving off hydrogen
4.2 Alcohols burn in air because of the presence of a hydrocarbon chain
4.2.1 When Ethanol burns in air 2C2H5OH + 3O2 = 3H2O + 2CO2

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