C1, Alkenes

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  • Created by: emmajane_
  • Created on: 27-05-14 16:26
What is cracking?
It breaks down large hydrocarbons into smaller and more flammable molecules
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After the hydrocarbon have been heated and vapourised in the fraction, which two possibilities could follow? WHat is the purpose of these stages?
1. passed over a hot catalyst 2. Mixed with steam and heated to a high temperature This breaks down molecule, causing thermal decompostion
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What is the formula for Alkenes?
CnH2n
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What are alkenes?
Unsaturated hydrocarbons with double covalent bonds joining the two carbon molecules
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Why can alkenes be used as fuels?
Becuase they can react with oxygen in the air
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Name 3 things that alkenes can be used for
Fuel, ethanol and polymers (plastics)
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How can you test for unsaturation?
Bromine water, which is mormally an orange-brown becomes colourless when shaken with an alkene, but remains the same colour when shaken with an alkane
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What is ethene polymerised to form?
Polyethene
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Card 2

Front

After the hydrocarbon have been heated and vapourised in the fraction, which two possibilities could follow? WHat is the purpose of these stages?

Back

1. passed over a hot catalyst 2. Mixed with steam and heated to a high temperature This breaks down molecule, causing thermal decompostion

Card 3

Front

What is the formula for Alkenes?

Back

Preview of the front of card 3

Card 4

Front

What are alkenes?

Back

Preview of the front of card 4

Card 5

Front

Why can alkenes be used as fuels?

Back

Preview of the front of card 5
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