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Hydrocarbons and crude oil
Crude oil is a mixture of HYDROCARBONS
(compounds made up of carbon and hydrogen).
Some examples:
H H Longer chains mean...
Increasing length
H C C H
1. Less ability to flow
H H
Ethane 2. Less flammable
H H H H 3. Less volatile
H C C C C H
H H H H 4. Higher boiling point
Butane…read more

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Fractional distillation
Crude oil can be separated by fractional distillation. The oil is evaporated
and the hydrocarbon chains of different lengths condense at different
temperatures:
Fractions with
low boiling
points condense
at the top
Fractions with
high boiling
points condense
at the bottom…read more

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Properties of materials
Plastic (polythene)
· Light
· Flexible
· Easily moulded…read more

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Properties of materials
Plastic (polystyrene)
· Light
· Rigid
· Good insulation…read more

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Properties of materials
Nylon
· Light
· Tough
· Waterproof…read more

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