Unit 2- Hydrocarbons Flashcards

0
Q

Name a subset of hydrocarbons

A

Alkanes

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1
Q

What is a homologous series?

A

A set of compounds with the same general formula and similar chemical properties

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2
Q

How can you identify an alkane by looking at its name?

A

The -ane ending

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3
Q

What is the general formula for alkanes?

A

CnH2n+2

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4
Q

How many carbons are in meth-

A

1

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5
Q

How many carbons are in prop-

A

3

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6
Q

How many carbons are in pent-

A

5

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7
Q

How many carbons are in hept-

A

7

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8
Q

How many carbons are in non-

A

9

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9
Q

How many carbons are in dec-

A

10

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10
Q

How many carbons are in eth-

A

2

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11
Q

How many carbons are in oct-

A

8

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12
Q

How many carbons are in but-

A

4

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13
Q

How many carbons are in hex-

A

6

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14
Q

How can straight chain alkanes be named?

A

From their molecular formula, shortened and full structural formulae

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15
Q

What is the molecular formula for methane?

A

CH4

16
Q

What is the shortened formula for pentane?

A

CH3, CH2, CH2, CH2, CH3

17
Q

What I the molecular formula for propane?

A

C3H8

18
Q

What is the shortened formula for propane?

A

CH3, CH2, CH3

19
Q

What is the molecular formula for pentane?

A

C5H12

20
Q

What is the shortened structural formula for methane?

A

CH4

21
Q

What is the molecular formula for ethane?

A

C2H6

22
Q

What is the shortened structural formula for butane?

A

CH3, CH2, CH2, CH3

23
Q

What is the molecular formula for butane?

A

C4H10

24
Q

What is the shortened structural formula for ethane?

A

CH3, CH3

25
Q

How are the branches of branched chain alkanes named?

A

They are named after the corresponding alkanes with the ‘-ane’ ending changed to ‘-yl’

26
Q

Give an example of a branch name

A
Methly
Ethyl
Propyl 
Butly
Pently
27
Q

How do you name a branched chain alkane?

A
  • Select the longest, continuous chain of carbon atoms an name it after the appropriate alkane
  • number the carbon atoms from the end of the chain nearer the branch
  • name the branches and indicate the position of the branches on the chain
28
Q

What are alkenes?

A

A subset of compounds called hydrocarbons

29
Q

What makes an alkene different from an alkane?

A

It has a double bond

30
Q

What is the alkene general formula?

A

CnH2n

31
Q

What are cycloalkanes?

A

A subset of compounds called hydrocarbons

32
Q

What is the cycloalkanes general formula?

A

CnH2n