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Chemistryyy > Organic Chemsitry > Flashcards

Organic Chemsitry Flashcards

1
Q

what is a homologous series

A

a group of organic compounds which share some characteristics

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2
Q

What characteristics do a homologous series share

A
  • each compound has same functional group, and same general formula
  • all do the same chemical reactions
  • a gradual change in physical properties like boiling points, viscosity
  • differ from previous member by a CH2 group
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3
Q

how are all ends arranged

A

They have a double carbon bond

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4
Q

how are alcohols arranged

A

R (rest of molecule) -OH

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5
Q

way of remembering how many carbon atoms are in a molecules

A

Monkeys - meth
Eat - eth
Peeled - prop
Bananas - but
Properly - pent

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6
Q

what are the threes endings and what do they mean

A

ane -means it belongs to the alkanes/ homologous series
ene - alkene
anol- alcohol

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7
Q

what are hydrocarbons and give and example

A

compounds that only contain C and H atoms

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8
Q

General formula of alkanes

A

CnH2n+2

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9
Q

how are alkanes different and similar

A

Different - physical properties and differ by CH2
Similar - same functional group, general formula and chemical proeprties

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10
Q

Molecular formula and state at room temp of methane

A

CH4 - gas

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11
Q

Molecular formula and state at room temp of Ethane

A

C2H6 - gas

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12
Q

Molecular formula and state at room temp of propane

A

C3H8 - gas

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13
Q

Molecular formula and state at room temp of butane

A

C4H10 - gas

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14
Q

Molecular formula and state at room temp of pentane

A

C5H12 - liquid

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15
Q

Molecular formula and state at room temp of hexane

A

C6H12 - liquid

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16
Q

What are isomers

A

Compounds with the same molecular formula but different structures so hence their properties can differ

17
Q

Which isomer of pentane would you expect to have the lowest boiling point

A

Dimethyl propene - as molecules aren’t able to line up closely together so weaker intermolecular forces

18
Q

What is formed when complete combustion happens with an alkane and oxygen

A

Carbon dioxide and water are formed

19
Q

Why are the shorter alkanes used as fuels

A

They react easily with oxygen

20
Q

Why are alkanes quite interactive

A

Have many single strong covalent bonds

21
Q

What do i also need to revise

A

STRUCTURES OF BRANCHES ALKANES AND ISOMERS ON PAGES 9 AND 10

Chemistryyy (52 decks)

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