SJ_
Mind Map by , created over 6 years ago

AQA C1.5

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SJ_
Created by SJ_ over 6 years ago
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CRACKING
1 Smaller molecules are made from larger molecules
2 Saturated molecule changes to a smaller unsaturated molecule and a saturated molecule

Annotations:

  • Saturated - all single bonds
3 Heat is used to vapourise the molecule

Annotations:

  • Vapourise - change a liquid to a gas by heating
3.1 Vapours pass over a hot catalyst

Annotations:

  • Catalyst - a chemical which makes a reaction go faster
4 Can be used as a way of making FUELS and POLYMERS
5 Makes alkenes
5.1 Ethene is an alkene
5.1.1 Used to make
5.1.1.1 Ethanol
5.1.1.1.1 Fermentation is another way to make ethanol
5.1.1.1.1.1 Sugar--> Carbon dioxide + Ethanol
5.1.1.1.1.1.1 Sugar is RENEWABLE
5.1.1.1.1.1.2 Yeast is needed for this reaction
5.1.1.1.2 Ethene + Steam --> Ethanol
5.1.1.1.2.1 HYDRATION
5.1.1.2 Polymers e.g. poly(ethene)
5.1.1.2.1 New packaging materials
5.1.1.2.2 Waterproof coating for fabrics
5.1.1.2.3 Polymerisation
5.1.1.2.3.1 Small to large
5.1.1.2.4 Monomers change to polymers
5.1.1.2.5 Dental polymers
5.1.1.2.6 Shape memory polymers
5.1.1.2.7 Not biodegradable
5.1.1.2.7.1 Causes problems at landfill sites
5.2 Unsaturated molecules
5.2.1 Carbon to carbon double bond
5.2.2 C=C
5.2.3 Use bromine water as a test
5.2.3.1 Orange to colourless would be seen
5.3 CnH2n
6 THERMAL DECOMPOSITION

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