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Year 11 - Chemistry > C9 - Crude Oil And fuels > Flashcards

C9 - Crude Oil And fuels Flashcards

1
Q

What is crude oil?

A

A finite resource found in rocks often under oceans

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2
Q

What are groups of molecules called?

A

Homologous groups

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3
Q

If it ends in -ane what is it?

A

A alkane

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4
Q

Crude oil is a mixture of…

A

Hydrocarbons

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5
Q

How many carbons in methane?

A

1

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6
Q

How many carbons in ethane?

A

2

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7
Q

How many carbons in propane?

A

3

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8
Q

How many carbons in butane?

A

4

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9
Q

What is the rule to work out the formula for an alkane?

A

CnH2n+2

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10
Q

How is crude oil separated?

A

By fractional distillation

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11
Q

Explain the method for crude oil being separated.

A

Crude oil is heated and the fractions boil at their specific boiling point before condensing to be collected.

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12
Q

What are the 5 properties of alkanes?

A

Flammable
Saturated
Immiscible
Volatile
Viscous

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13
Q

The longer the chain length…

A

The higher the boiling point

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14
Q

Why does a long chain length have a higher boiling point?

A

More intermolecular forces to overcome

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15
Q

What is volatility?

A

The property of evaporation so the shorter the chain the more volatile.

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16
Q

What is viscosity?

A

The property that determine flow so longer chains are more viscous

17
Q

Why does viscosity occur?

A

More intermolecular forces to keep them stuck together meaning less flow

18
Q

Which chains are more flammable?

A

Longer chains are less flammable than shorter chains

19
Q

Why is something flammable?

A

More intramolecular bonds to break

20
Q

Are alkanes immiscible?

A

No lakebed mix with water

21
Q

Are alkanes saturated?

A

All alkanes are saturated which are full of single bonds

22
Q

What are alkenes?

A

Also hydrocarbons
Have one double bond with carbon
All end in -ene

23
Q

What is the formula for alkene?

A

CnH2n

Year 11 - Chemistry (2 decks)

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