Question 1
Paper 2Medium7 marksA pilot plant produces bioethanol from glucose in crop biomass. Figure 1 shows a simplified carbon pathway for one batch. The fermentation equation is:
Use relative atomic masses from the data booklet where needed.
(a)[1]
Write a balanced equation for photosynthesis in plants.
(b)[3]
Use the fermentation equation and Figure 1 to calculate the theoretical mass of ethanol and the percentage yield for this batch. Give the mass in kg and the percentage yield to three significant figures.
(c)[2]
Using Figure 1, explain why the ethanol can be considered a renewable fuel.
(d)[1]
State one reason why Figure 1 alone does not establish that using this bioethanol is carbon neutral.