1. crude oil heated to evaporate hydrocarbons 2. Water vapour passes to fractionating column near bottom and cools as it rises 3. Fraction condenses to liquid and runs off when its cooled below its boiling point 4. Any remaining gases leave tower
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What is an intermolecular force?
Force between molecules that hold them together
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What are the properties of vulcanised rubber?
High strength, hard and flexible
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What are the properties of unvulcanised rubber?
Low strength, soft, flexible
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What is polymerisation?
Important process in which hydrocarbons are joined together to make polymers
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What is a monomer?
Small hydrocarbon molecule
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What is a polymer?
Long molecule
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What is an example of polymerisation?
Carrier bags were made of paper now made of polythene
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What is a covalent bond?
Bond between atoms
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What are cross links?
Strong covalent bonds between long chain molecules, makes harder and stiffer
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What are plasticizers?
Small molecule that sits between molecules and forces chains apart. Polymer soft
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