C1 - FOSSIL FUELS

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  • FOSSIL FUELS
    • Most are HYDRO-CARBONS
      • only difference between most fossil fuels is the LENGTH of the hydrocarbons they contain
      • EXCEPT coal - mainly carbon w/ lots of impurities
    • Formed from remains of dead plants/animals over millions of year
      • Fuels are retrieved by digging out the earth
    • combustion - a type of chemical reaction
    • Oxygen added = an oxidation reaction
      • Oxygen is needed to burn hydrocarbons
        • they burn quicker in pure oxygen than in oxygen from the air
          • so pure oxygen taken from air, and kept in pressure cylinders for later use
  • WHEN HYDRO-CARBONS BURN
    • 2H(2) + O(2) = 2H(2)O
    • C + O(2) = CO(2)
      • WHEN COAL BURNS

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