C1 Cracking, polymers and ethanol Flashcards Preview

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Flashcards in C1 Cracking, polymers and ethanol Deck (40)
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1

What process is used to break larger hydrocarbon molecules into smaller one?

Cracking

2

Describe this process.

Vaporise the hydrocarbon and pass over a hot aluminium oxide catalyst

3

What is a hydrocarbon?

Compound made from only carbon and hydrogen

4

What are the products of cracking?

Smaller alkanes and alkenes

5

What is a catalyst?

Something that speeds up a reaction without being used up

6

Give 3 uses of the products of alkenes.

Fuels, plastics, ethanol

7

Give the general formula of alkenes.

CnH2n

8

Are alkenes saturated or unsaturated?

Unsaturated

9

How can you test for unsaturation?

Bromine water is decolourised

10

What is the formula for ethene

C2H4

11

Draw a propene molecule.

12

What special feature does an alkene contain?

Double bond

13

What do you see if bromine is added to ethene?

Goes from orange to colourless

14

What is a monomer?

An alkene

15

What is a polymer?

Many monomers joined together

16

Give the reaction for the polymerisation of ethene?

17

Name the product for the polymerisation of ethene?

Polyethene

18

Give the reaction for the polymerisation of propene?

19

What feature do polymers not have that the monomers do?

Double bonds

20

Polymers have many new uses, give 2 examples.

Hydrogels in nappies and waterproof coating like Gore-tex

21

Many polymers are not biodegradable, what does this mean?

Don’t break down

22

Give 2 problems with polymers not being biodegradable.

Fill up landfill sites and produce litter

23

Some plastic bags are made from cornstarch polymer why is this useful?

Renewable and biodegradable

24

List 3 ways in which polymers are disposed of.

Incineration, landfill and recycle

25

Give an advantage and disadvantage for incinerating polymers.

Give out energy

Give out carbon dioxide which leads to global warming

26

Give an advantage and disadvantage for putting polymers in landfills.

Easy

Don’t biodegrade so they get filled up

27

Give 3 advantages of recycling polymers.

Less waste in landfills

Not wasting a non-renewable resource

Less pollution produced and energy used

28

Give 2 disadvantages of recycling polymers.

Collecting and sorting

Transportation

29

Give a word equation for the production of ethanol through fermentation.

Glucose + water → ethanol

30

Describe the process of fermentation.

Add sugar and yeast to warm water in the absence of oxygen