1. Rearrange the anagrams above to show where our ethanol comes from.
Dire box on acid
Cloudier
It’s posh honesty
Install idiot
Go clues
Nag crick
In rotten fame
Tiny hoard
ETHANOL
ETHANOL
Rearrange the anagrams above to show where our ethanol comes from.
Complete these equations:
catalyst
………………. + Water Ethanol
Ethanol can be made by two processes, ethene reacting with ……………. under pressure in the presence of a ………………., or the fermentation of …………..…. using enzymes in ………………..
Word bank: catalyst, sugar, yeast, steam
catalyst
C2H H2O …………..
yeast
Glucose Ethanol + ………………………
yeast
…………… C2H5OH + ………………

2. Fermentation Hydration
Use the table to compare advantages and disadvantages of making ethanol by fermentation versus hydration
Draw the structural formula for ethanol C2H5OH below:
Fermentation
Hydration
Fermentation produces CO2 gas as a by-product. Fortunately it is a carbon neutral process. What does this mean?
…………………………………………………………………………………………………………………………………………………………………………………………
Explain your answer …………………………
…………………………………….....
Is ethanol a hydrocarbon? ………….
Why is a continuous process better than a batch process for making a product in industry?
………………………………………………………………………………………………………………………………………………………………
Delete wrong answer
Fermentation:
Continuous / Batch
Hydration:
Continuous / Batch

3. Answers

4. Rearrange the anagrams above to show where our ethanol comes from.
Carbon dioxide
Crude oil
Photosynthesis
Distillation
Glucose
Cracking
Fermentation
Hydration
ETHANOL
ETHANOL
Rearrange the anagrams above to show where our ethanol comes from.
Complete these equations:
catalyst
Ethene + Water Ethanol
Ethanol can be made by two processes, ethene reacting with steam under pressure in the presence of a catalyst, or the fermentation of sugar using enzymes in yeast.
Word bank: catalyst, sugar, yeast, steam
catalyst
C2H H2O C2H5OH
yeast
Glucose Ethanol + Carbon Dioxide
yeast
C6H12O C2H5OH + 2CO2

5. Draw the structural formula for ethanol C2H5OH below:
Use the table to compare advantages and disadvantages of making ethanol by fermentation versus hydration
Draw the structural formula for ethanol C2H5OH below:
Fermentation produces CO2 gas as a by-product. Fortunately it is a carbon neutral process. What does this mean?
Overall the level of CO2 in the atmosphere remains unchanged as when the sugar cane is grown it removes carbon dioxide from the atmosphere by photosynthesis.
Hydrocarbons contain hydrogen and carbon only. There is also an oxygen atom in ethanol.
Is ethanol a hydrocarbon?
Explain your answer No
In terms of ‘greenness’ hydration is a clean reaction but uses non-renewable crude oil and also requires burning of fossil fuels to gain required temperature for reaction. Fermentation is undoubtedly cleaner but is not 100% carbon neutral (energy is required for processing / transport) and does mean less land available for farmland. Destruction of rainforest (important carbon sinks) is also a disadvantage of fermentation.
Why is a continuous process better than a batch process for making a product in industry? There is no downtime – a continuous process runs 24hrs a day, 7 days a week.
Delete wrong answer
Fermentation:
Batch
Hydration:
Continuous