oils

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cracking
is a thermal decomposition reaction. oil fractions are heated so they vaporise. Their vapours are either passed over a hot catalyst or mixed with steam and heated to very high temperatures.
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Alkenes
Alkenes are hydrocarbons. They are unsaturated because their molecules contain one or more carbon to carbon double bonds.
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general formula for alkenes
CnH2n
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general formula for butene
C4H8
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polymerisation
Alkene molecules can act as MONOMERS. They can join together in a POLYMERISATION reacton to make very large molecules called POLYMERS. for example, ethene forms poly(ethene)
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uses of polymers
hydrogels (for babies nappies) - false teeth and fillings
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Card 2

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Alkenes are hydrocarbons. They are unsaturated because their molecules contain one or more carbon to carbon double bonds.

Back

Alkenes

Card 3

Front

CnH2n

Back

Preview of the back of card 3

Card 4

Front

C4H8

Back

Preview of the back of card 4

Card 5

Front

Alkene molecules can act as MONOMERS. They can join together in a POLYMERISATION reacton to make very large molecules called POLYMERS. for example, ethene forms poly(ethene)

Back

Preview of the back of card 5
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