Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A Level Chemistry Units 3+4 > 3.2.1 Alkanes and Petroleum > Flashcards

3.2.1 Alkanes and Petroleum Flashcards

1
Q

Alkanes general formula

A

CnH2n+2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Alkanes are made up of which element(s)

A

hydrocarbons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Alkanes

saturated or unsaturated?

A

saturated, contain only single bonds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Cycloalkanes

A

Ring of carbon atoms with 2 hydrogen atoms attached to each carbon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Cycloalkanes

general formula

A

CnH2n

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Crude oil made up of

A

mainly alkanes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Petroleum

A

(fancy) word for crude oil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Petroleum made up of

A

mixture of hydrocarbons

mainly alkanes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Separation of crude oil technique

A

fractional distillation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Fractional distillation

brief method

A

crude oil vaporised at 350 degrees C
into fractionating column and rises
crude oil cools as it moves up
different fractions condense at different levels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Hydrocarbons with highest boiling points in crude oil …

A

don’t vaporise,
run to the bottom
form a residue (bitumen)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Hydrocarbons with lowest boiling points in crude oil…

A

don’t condense

drawn off as gases at top of column

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Shorter chain hydrocarbons in crude oil have …

A

lower boiling points

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Heavier fractions are

A

cracked

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Cracking

A

breaking long-chain alkanes into smaller hydrocarbons by breaking c-c bonds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Two types of cracking

A

thermal and catalytic

17
Q

Thermal cracking

conditions

A

high temp and high pressures

up to 1000 degrees C and 70 atm

18
Q

Thermal cracking

products

A

produces lots of alkenes

used to make valuable products eg: polymers for plastics

19
Q

Catalytic cracking

conditions

A

zeolite catalyst

slight pressure and high temp (about 450 degrees C)

20
Q

Catalytic cracking

products

A

produces mainly aromatic hydrocarbons and motor fuels

21
Q

Catalytic cracking

advantages

A

cuts costs
reaction done at lower temp and pressure
catalyst also speeds up reaction

A Level Chemistry Units 3+4 (34 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions