CGP Cracking crude oil.

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What happens when long hydrocarbon molecules are heated to high temperatures with a catalyst and what is this called?
Thy are broken down into smaller molecules, this is called cracking.
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What is done to diesel to produce products that are more in demand?
It is cracked.
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What useful substances are produced when diesel is cracked?
Examples are petrol, paraffin, ethene
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What type of action is cracking?
Thermal decomposition.
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What is bromine water used to test?
Whether a substance is an alkane or alkene.
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What effect do alkenes and alkanes have on bromine water?
Alkenes decolourise bromine water, but alkanes don't.
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Which of the following would decolourise bromine water; propane, ethene or ethane?
ethene.
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In which order should the following be in the cracking process: The vapour is passed over a catalyst at a high temperature; The long-chain molecules are heated; The molecules are cracked on the surface of the catalyst; They are vaporised?
1. The long-chain molecules are heated. 2. They are vaporised. 3. The vapour is passed over a catalyst at a high temperature. 4. The molecules are cracked on the surface of the catalyst.
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What is present after cracking?
Both alkanes and alkenes.
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What is the word equation of kerosene to octane and ethene?
Kerosene (arrow symbol) octane + ethane.
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What is the symbol equation of kerosene to octane and ethene?
C_(10)H_(22) (arrow symbol) C_(8)H_(18) + C_(2)H_(4).
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***CHECK DIAGRAMS OF CRACKING**
*
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Card 2

Front

What is done to diesel to produce products that are more in demand?

Back

It is cracked.

Card 3

Front

What useful substances are produced when diesel is cracked?

Back

Preview of the front of card 3

Card 4

Front

What type of action is cracking?

Back

Preview of the front of card 4

Card 5

Front

What is bromine water used to test?

Back

Preview of the front of card 5
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