Chemistry - Cracking Hydrocarbons

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Lighter fractions (smaller chains) of crude oil are in high demand. Why?
low boiling points, highly flammable, flow easily, evaporate easily, thin liquid/gas (larger fractions are basically opposite)
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What does cracking do to larger molecules(hydrocarbons)?
Breaks them down
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This process involves ___ the heavier hydrocarbons
heating(vaporising)
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Then we can either pass over a hot c___ (breaking the chain) or mix with steam and heat to __ temp.
catalyst. high temp
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When we crack a hydrocarbon, we form..
smaller alkane and an alkene
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the alkenes and alkanes formed are ___less, v___ substances
colourless, volatile
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We can use b___ water to distinguish the two
bromine
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What happens to alkene when it reacts with bromine water?
it discolours it (goes colourless) because of the double bond making alkene more reactive than alkane
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Other cards in this set

Card 2

Front

What does cracking do to larger molecules(hydrocarbons)?

Back

Breaks them down

Card 3

Front

This process involves ___ the heavier hydrocarbons

Back

Preview of the front of card 3

Card 4

Front

Then we can either pass over a hot c___ (breaking the chain) or mix with steam and heat to __ temp.

Back

Preview of the front of card 4

Card 5

Front

When we crack a hydrocarbon, we form..

Back

Preview of the front of card 5
View more cards

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