14 - Organic chemistry (Acids and alcohols) Flashcards
1
Q
Production of alcohol.
fermentation
A
Fermentation of glucose
Anaerobic respiration of yeast
Glucose –> ethanol + carbon dioxide + 2 ATP
(exothermic)
Temperature: 35°C
Fractional distillation is used to separate ethanol from mixture.
2
Q
Production of alcohol.
steam
A
Ethene + steam ⇌ Ethanol
C2H4 + H2O –> C2H5OH
Temperature: 300°C
Pressure: 60-70 atm
Catalyst: Phosphoric (V) acid
3
Q
State 3 advantages of fermentation.
A
- Renewable source
- Can use waste organic material
- Doesn’t require much energy
4
Q
State 3 disadvantages of fermentation.
A
- Yeast has to be replaced
- Slow process
- Batch process
5
Q
State 3 advantages of producing alcohol using ethene.
A
- Fast
- Continuous process
- Efficient production
6
Q
State 3 disadvantages of producing alcohol using ethene.
A
- High energy requirements
- High fixed cost of production
- A lot of unreacted ethene
7
Q
State 3 uses of ethanol.
A
- Alcoholic drinks
- Solvent
- Fuel
8
Q
How is ethanoic acid made?
A
Ethanol is oxidised.
Oxidation agent: Potassium manganate (VII)
