C1 Overview
- Created by: GraceLong
- Created on: 05-01-16 17:58
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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
- Crude oil
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