C10 Organic reactions Flashcards

1
Q

What do all organic molecules contain

A

carbon atoms

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2
Q

C=C grouping is an example of what group?

A

functional group

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3
Q

What does a functional group give?

A

a ‘family’ of organic compounds their characteristic reactions

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4
Q

What is a ‘family’ of organic compounds with the same functional group called?

A

homologous series

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5
Q

Successive members of a homologous series differ from each other by an extra what?

A

carbon atom that has two hydrogen atoms bonded to it

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6
Q

What is the general formula for alkenes?

A

CnH2n

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7
Q

How can you test the ethene gas to see if its an alkene?

A

using a lighted splint and if it burns smokier and yellow (luminous) flame because there is incomplete combustion in alkenes

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8
Q

Do alkanes or alkenes release more energy per mole of combustion?

A

alkanes

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9
Q

Are alkenes or alkanes used as fuels?

A

alkanes because they release more energy

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10
Q

Are alkenes or alkanes more reactive and why

A

Alkenes are more reactive because of the double carbon bond because they can split the double bond and 1 molecule join each

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11
Q

Can you give the formula for dibromoethane

A

C2H4 + Br2 -> C2H4Br2

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12
Q

Can you draw ethene?

A
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13
Q

Can you draw butene

A
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14
Q

What are alkenes?

A

unsaturated compounds

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15
Q

What does the addition of a hydrogen molecule H2 across the double bond of an alkene do?

A

forms a saturated hydrocarbon - an alkane

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16
Q

What conditions are needed to turn and alkane into an alkene?

A

60c in prescience of a nickel catalyst

17
Q

How do you create ethanol from ethene and steam?

A

with a catalyst, energy to heat gases and t generate a high temperature

18
Q

Is alkenes reaction with water (steam) reversible or irreversible?

A

reversible

19
Q

Can you draw the formula for ethanol using ethene and steam

A

C2H4 + H2O <-> C2H5OH

20
Q

What are the 3 reactions alkenes can react with to form a saturated molecule?

A

halogen’s, hydrogen and water (steam)