Alcohols

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  • Created by: EmanB
  • Created on: 26-01-14 22:27
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  • Alcohols
    • Ethanol
      • Fermentation
        • Sugar/starch, ethanol conc. 14% alcohol
          • Anaerobic, prevents oxidation
        • In solution, low temps., presence of yeast, catalysed by zymase
        • Slow at temps below 25, above 37: enzyme denatures
          • Enzyme ceases to function above alcohol conc of 14%
            • C6H12O6 --> 2CH3CH2OH + 2CO2
      • Hydration
        • Steam, phosphoric acid, H2PO4
        • Reversible, conversion of ethene incomplete, 5% converted to ethanol
        • Unreacted gases recycled, 95% conversion acheived
        • C2H4 + H2O --> CH3CH2OH
    • Properties
      • High MP/BP
        • Able to form hydrogen bonds
      • Soluble in water
        • Forms hydrogen bonds with water molecules
        • Longer the chain of hydrocarbons, less soluble
      • Low volatility
        • Doesn't vaporise that easily

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