4 Alcohols Flashcards
1
Q
What is the suffix for 2 alcohol groups?
A
Diol
2
Q
Boiling point trend for alcohols?
A
Higher melting/ boiling point than similar legnth alkenes/ alkanes as H atom in OH bond can bond with other alcohol groups and water
3
Q
Are alcohols soluble in water?
A
Yes.
4
Q
How can ethanol be produced?
A
Industrially from ethene
From the fermentation of glucose
5
Q
Producing ethanol from the fermentation of carbohydrates.
A
- Uses renewable resources: carbohydrate crops
- Catalyst: Enzymes in yeast
- Conditions: Aqueous, Anaerobic, around 35°c
(anaerobic = no carboxylic acid produced) - Batch Process
- Slow rate of reaction
- Impure ethanol obtained, made pure by fractional distillation
6
Q
Industrially producing ethanol from ethene
A
- Uses ethene: finite resource from crude oil
- Catalyst: Phosphoric acid
- Conditions: 300°c, 70 atmospheres
- Continuous process
- Fast rate fo reaction
- Pure ethanol obtained
7
Q
Equation for producing ethanol from fermentation of glucose.
A
C₆₁H₂O₆ → 2C₂H₅OH + CO₂
8
Q
Equation for producing ethanol from ethene
A
C₆H₁₂O₆ ⇌ 2C₂H₅OH + CO₂
9
Q
Ethanol as a fuel
A
- Burns more cleanly than petrol
- Potentially carbon neutral
10
Q
What does it mean for a process to be carbon neutral?
A
The process results in no net increase in CO₂ emissions.
11
Q
A
