Brainscape's Knowledge GenomeTM

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


See full index

Chemistry > Alkanes > Flashcards

Alkanes Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
0
Q

What is the general formulae for an Alkanes ?

A

CnH2n+2

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

What words (sentence) do we use to remember the names of the Alkanes in order?

A

My (Methane), elephant (Ethane), prefers (propane), bananas (Butane), peeled (pentane).

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

Alkanes are an …….series?

A

Homologous series of saturated hydrocarbons.

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

Homologous series is a series if compounds which; (4)

A
  • have the same general formula
  • have the same chemical properties
  • have the same physical properties which increase up the series
  • differ from their nearest neighbour in molecular formula by a constant amount, CH2
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is a hydrocarbon?

A

A compound made up of carbon and Hydrogen only.

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

What is the definition of Saturated?

A

Only contains single bonds

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

What does the boiling point do as the carbon chain increases?

A

Increases

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

All Alkanes burn in excess oxygen to form…..? (2 substances)

A

Carbon dioxide and Water

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

What is a STRUCTURAL ISOMERISM?

A

2 or more compounds which have

  • the same molecular formula
  • different structural formula
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Combustion

A

When Alkanes burn in excess of oxygen they give out large amounts of HEAT ENERGY hence they make good fuels.

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

What are the products of the combustion of Alkanes?

A

Carbon dioxide

Water

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

What is the equation for the combustion of Alkanes?

A

……………+Oxygen=Carbon Dioxide+Water

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

What are the observations when Alkanes react with halogens?

A
  • 2 layers form

- orange layer SLOWLY goes colourless

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

What is the equation for complete combustion?

A

Alkanes (Hydrocarbon)+excess oxygen= carbon dioxide + water

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

If there is a LIMITED SUPPLY OF EXYGEN what is the equation for the complete combustion?

A

Alkanes+limited supply if oxygen = carbon monoxide +water

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

What three words go with CARBON MONOXIDE that all end in ‘s’…!!!!!!

A

Colourless
Odourless
Poisonous

16
Q

In which 3 scenarios does INCOMPLETE COMBUSTION take place?

A
  • car engines
  • boiler in a poorly ventilated situation
  • Calourgas heater in a poorly ventilated room
17
Q

What is the equation for cracking?!!!!

A

Heat

Long chain alkane >short chain+alkene. Catalyst

18
Q

What are Alkanes used for

A

Making plastic

19
Q

What are short chain Alkanes used for?

A

Used as fuels

20
Q

What fractions are usually cracked?

A

Long chain or medium chain hydrocarbons

21
Q

What are polymers?

A

Long chain molecules which are mad when small molecules Called Momomers are added together.

22
Q

Unsaturated Alkanes with carbon-carbon double bonds can act as….??

A

Monomers

23
Q

When monomers are heated up with an “initiator” and put under high pressure what happens to form a polymer?

A

The double bonds open up to form a very long chain of single bonded carbon atoms. ADDITION POLYMERISATION

24
Q

What is the repeating pattern if atoms along the polymer chain called?

A

Repeating unit

25
Q

What do the properties of the polymer depend upon? (3)

A
  • The monomer it’s made from
  • The conditions it’s made under
  • Whether or not it has cross links
26
Q

Whey comes as a result of polymer chains not all being the same length?

A

It’s physical properties are more of mixture.

27
Q

How many isomers does propene have?

A

NONE!!!!!!

28
Q

What are the properties of polyethene/ethene? (4)

A
  • low density form LDPE
  • Very flexible light but not very strong
  • high density form HDPE
  • Light and strong/more ridged
29
Q

Uses of Ethene/polyethene? (2)

A
  • plastic shopping bags

- drink Bottles, Buckets and Bowls

30
Q

What are the properties of propene/polypropene? (1)

A

Very tough and strong

31
Q

What uses does propene/polypropene have? (3)

A

Crates
Ropes
Carpets

32
Q

What are the properties of chloroethene (vinyl chloride)/polychloroethene (PVC)? (2)

A
  • Ridged and very waterproof

- very resistant to chemicals

33
Q

What are the uses of chloroethene (vinyl chloride)/polychloroethene (PVC)? (2)

A
  • wellies
  • credit cards
  • gutters bad drain pipes
  • window frames
  • insulating coating for electrical wires
34
Q

What are the properties of phenylethene (styrene)/polystyrene (PS)? (1)

A

Hard and brittle but can be expanded with gas

35
Q

What are the uses of phenylethene (styrene)/polystyrene (PS)? (4)

A
  • Foam packaging
  • cups
  • fast food cartons
  • electrical insulation
36
Q

What’s a monomer?

A

Small molecule with a double bond

e.g. C=C

37
Q

What does UNSATURATED mean?

A

A compound contains a DOUBKE BOND.

38
Q

What’s the general formulae for Alkenes?

A

CnH2n

Chemistry (15 decks)

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