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Ethanol can be made by fermentation - Edexcel - GCSE Chemistry - Question 2 - 2014 - Paper 1
Question 2
Ethanol can be made by fermentation. (i) In a fermentation reaction, yeast is added to sugar solution. Complete the sentence by putting a cross (✗) in the box next... show full transcript
Worked Solution & Example Answer:Ethanol can be made by fermentation - Edexcel - GCSE Chemistry - Question 2 - 2014 - Paper 1
Step 1
Step 2
Explain how the contents of the flask at 75°C would be different from the contents of the flask at 40°C.
Answer
At 75°C, the higher temperature may denature the enzymes present in the yeast. As a result, fermentation may be significantly slowed down or might not occur at all compared to the contents of the flask at 40°C, where the enzymes remain functional and effective in catalyzing the fermentation process. Thus, the flask at 40°C would have more ethanol and other fermentation by-products than the flask at 75°C.