Why is fermentation carried out in warm conditions rather than at very high temperature?
Warmth gives a good rate, but too hot evaporates the glucose
Warmth gives a good rate, but too hot turns ethanol into ethene
Warmth denatures the enzymes, but too hot kills the yeast
Warmth gives a good rate, but too hot denatures the enzymes
43 exam-style questions on Edexcel GCSE Chemistry 10.4 Alcohols and carboxylic acids, covering 10.4.1 Alcohols and the -OH functional group, 10.4.2 Carboxylic acids and the -COOH functional group, 10.4.3 Oxidation of alcohols and homologous series, and 10.4.4 Fermentation and fractional distillation of ethanol. Each one has a worked solution and a mark scheme showing where the marks go.