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  • Hydrocarbons
    • Hydrocarbons contain only hydrogen and carbon atoms
    • Alkanes
      • Alkanes are a Homologous series
      • Have only single covalent bonds
      • The first four alkanes are methane, ethane, propane and butane
      • General formula = C n H 2n+2
    • Properties
      • main properties: viscosity, boiling point, ability to ignite and number of carbon atoms
        • Shorter hydrocarbons are more runny (less viscous)
        • Shorter hydrocarbons are more volatile (lower boiling points)
        • Less carbon atoms makes them more flammable (easier to ignite)
        • Short chains have less carbon atoms
    • Complete combustion
      • hydrocarbon + oxygen = carbon dioxide + water (+ energy0
      • The hydrogen and carbon in the hydrocarbon are oxidised
      • Hydroc's are used as fuel due to the amount of energy they release through combustion


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