C1 Overview

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  • C1 summary
    • Crude oil
      • Fractional distillation separates crude oil because of the different lengths of the molecules.
      • Crude oil is made from fossil fuels which are a finite resource
      • Bitumen exits at the bottom of the fractianating column because it has a high boiling point.
    • Clean air
      • Original atmosphere came from gases from Earth and plants photosynthesised to create more oxygen
      • 78% nitrogen 21% oxygen 0.035% carbon dioxide
      • Sulfur dioxide can cause difficulties with asthma and dissolves in water to create acid rain
    • Polymers
      • Alkenes have at least one double bond (unsaturated) Alkanes have single bonds only (saturated)
      • Polymerisation needs a high pressure and catalyst and changes alkene monomers into a chain
      • If plastics have weak intermolecular forces, they have a low melting point and can be stretchy or slide over each other
    • Food, smells, paints
      • Emulsion paint dries when water evaporates and the oil forms and protective skin. Oil paints dry when the solvent evaporates and the oil is oxidised
      • Esters are made when an acid is added to an alcohol and its heated. The condenser makes the reaction longer
      • Cooking: Protein molecules denature and change shape. Carbohydrate cell walls break down and they become easier to digest
      • A colloid is when particles are mixed but not dissolved
      • Hydrophilic head, hydrophobic tail


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