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Cards (12)
Alcohols
Extremely useful
molecules
, e.g. as
fuels
,
solvents
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Ethanol
Alcohol found in
alcoholic
drinks
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Methanol
Alcohol
with
one
carbon atom
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Alcohols
Homologous series
, have the same
functional
group
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Structural
formula
Simpler form of showing
molecule
structure
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First four alcohols
Methanol
(1 carbon)
Ethanol
(2 carbons)
Propanol
(3 carbons)
Butanol
(4 carbons)
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Alkane name
Alcohol name based on it (e.g.
ethane
->
ethanol
)
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Ethanol
One of the most important
alcohols
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Producing ethanol by hydration of ethene
1.
High yield
2. Requires
high temperature
and
energy
3. Uses
non-renewable crude oil
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Producing ethanol by fermentation
1. Uses
sugar
solution and
yeast
2. Requires
temperature
around
30°C
3. Must be
anaerobic
(without
oxygen
)
4. Produces
ethanol
and
carbon dioxide
5. Ethanol solution needs to be
purified
by
distillation
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Fermentation to produce ethanol
Advantages:
low
temperature, uses
renewable
plant-based sugars
Disadvantage: produces
aqueous
ethanol solution that needs
distillation
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You'll find plenty of questions on
alcohols
in the
revision
workbook
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