C1.5 Products from Oil Flashcards Preview

GCSE Chemistry > C1.5 Products from Oil > Flashcards

Flashcards in C1.5 Products from Oil Deck (25):
1

How do your break down large hydrocarbons in crude oil?

cracking

2

Where does cracking take place?

at an oil refinery in a steel vessel called a cracker

3

What happens in the cracker?

a heavy fraction is heated to vaporise the hydrocarbons, the vapour is passed over a hot catalyst or mixed with steam, heated to a high temperature, thermal deposition takes place, the large molecules split from the smaller more useful ones

4

Are alkenes saturated?

no

5

What is the formula for alkenes?

CnH2n

6

Do alkenes contain a double bond?

yes

7

unsaturated hydrocarbons+bromine water

=colourless products

8

saturated hydrocarbons+bromine water

= no reaction (orange)

9

Uses of hydrocarbons

fuel, cooking, transport, heating,

10

Uses for chemical made from crude oil

cosmetics, explosives, plastics

11

Uses of polyethene

plastic bags, clingfilm, dustbins, strong, transparent

12

What is a long chain of monomers?

a polymer

13

Uses for polypropane

carpets and ropes

14

Examples of designer polymers

light sensitive plasters, dentures, packaging, bandages to treat burns

15

Examples of shape memory alloys

braces, stitches

16

Problems with plastic waste

landfill, wildlife gets trapped, take 100s of years to break down

17

What does biodegradable mean?

can be broken down by microorganisms

18

Ways to make plastic biodegradable

put in PLA, corn starch

19

Disadvantages of biodegradable plastics

corn crop will be used for industry not food, starvation, forests cut down for more crop land, destroy habitats of animals

20

Chemical symbol for ethanol

C2H5OH

21

How is ethanol for drinks made?

fermentation o sugar from plants

22

glucose+yeast

=ethanol+carbon dioxide

23

Uses of ethanol

solvent for decorators, perfume, fuel

24

ethene+steam

=ethanol

25

What is the reatcion for ethene+steam?

hydration