Chemistry - Chapter 4 (P1)

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How is crude oil formed?
Crude oil is formed from the buried remains of plants and animals (or fossil fuels)
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What is crude oil a mixture of?
Its a mixture of different compounds including hydrocarbons
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What is the process of separating crude oil called?
We can separate crude oil into different fractions by using fractional distiliation
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What is the process of fractional distilation ?
It is heated at the bottom. Then vaporised as you go up the column. Then various fractions are tapped off at different levels where they are condensed
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Crude oil is mostly ______.
Alkanes
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What are the first four alkanes?
Methane, ethane, propane, butane
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Carbons always make ____ ____.
Four bonds
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Are alkanes saturated or unsaturated?
Saturated
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What is the general formula for alkane?
CnH2n+2
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In comparison with large hydrocarbons, how would you describe small hydrocarbons?
More voltar (means how easy they turn to gas)
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How can alkanes be described?
Saturated
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The most viscous hydrocarbons are likely to leave the fractionating column at the______
The bottom
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What does voltar mean?
How easy they turn into gas
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What does viscosity mean?
How runny it is
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What happens when hydrocarbons burn in good supply of air, carbon dioxide and water?
The carbon and hydrogen in the fuel oxidise
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What is combustion?
Burning
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When a fuel is burnt it always produces?
Carbon dioxide and water
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What is the test for carbon dioxide?
Limewater --> turning cloudy
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What is the test for water?
Cobalt Chloride paper ---> turning pink = in the presence of water
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Other cards in this set

Card 2

Front

What is crude oil a mixture of?

Back

Its a mixture of different compounds including hydrocarbons

Card 3

Front

What is the process of separating crude oil called?

Back

Preview of the front of card 3

Card 4

Front

What is the process of fractional distilation ?

Back

Preview of the front of card 4

Card 5

Front

Crude oil is mostly ______.

Back

Preview of the front of card 5
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