C6 - Alcohols Flashcards

1
Q

What are the three main uses of ethanol?

A
  • in alcoholic drinks
  • as a solvent
  • in petrol replacements
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2
Q

What does fermentation require?

A
  • sugar
  • water
  • yeast enzymes
  • no oxygen
  • temperature between 25c and 50c
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3
Q

Why can ethanol be called renewable?

A

This is because it is made from plants which are renewable resources.

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4
Q

What is the word equation for ethanol?

A

Glucose = Ethanol + Carbon Dioxide

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5
Q

Why is fermentation carried out under controlled conditions?

A
  • if the temperature is too cold the enzymes are inactive
  • if the temperature is too hot the enzymes will become denatured
  • is air is present then ethanoic acid with be produced
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6
Q

What is the other way of producing ethanol?

A

Reacting ethene (made from crude oil) with water.

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7
Q

What is the word equation for hydration of ethene?

A

ethene + water = ethanol

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8
Q

What are the advantages to making ethanol by fermentation?

A
  • it is a renewable resource
  • it is carbon neutral
  • household waste can be used to make ethanol, reducing the need for landfill sites
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9
Q

What are the disadvantages of fermentation?

A
  • large areas of natural forest may be cut down to make room for the crops
  • the land might be better used for growing food for the local population rather than cash crops
  • its not an efficient process
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10
Q

What are the advantages to the hydration of ethene?

A
  • it is cheaper

- more economic than fermentation

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11
Q

What are the disadvantages to the hydration of ethene?

A
  • it is non-renewable
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