Crude Oil

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  • Crude oil
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  • Crude oil
    • What is it?
      • Formed by the remains of aniamls and plants that had died and burried millions of years ago
      • A large mixture of hydro-carbons
        • Not chemically combined
      • Thick, black, viscous liquid that floats on water
      • Hydrocarbon - molecules only containing H and C atoms
    • Fractional distillation
      • Liquids are separated if they have different boiling points in a mixture
      • Fractions contain groups of molecules with similar molecular masses
      • Crude oil- heated in furnace, passed into the lower part of the column
        • Hydrocarbon vapours rise & condence at differnt points
          • Drawn off trays by pipes and used for different things
    • Alkanes
      • Saturated hydrocarbon
        • C-C bonds are single covalent
      • CnH2n+2
      • Shorter chain- very flammable, very volatile, low b.p. low viscosity
      • Longer chain- less flammable, less volatile, high b.p. higher viscosity
    • Combustion
      • In plenty of O- complete combustion
        • Hydrocarb + O --> CO2 + H2O
      • In insufficient O- incomplete combustion
        • Hydrocarb + O --> CO + H2O
        • Carbon- monoxide binds to the Hb in the RBC instead of Oxygen


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