(b) Because of their high molar masses they are too involatile for use as diesel fuel.(e) To increase the yield of transester by shifting the position of equilibrium towards the product side.2. (a) C6H12O6 → 2C2H5OH + 2CO2(b) The enzyme in the yeast (zymase) responsible for the fermentation is destroyed when the alcohol concentration exceeds about 15%. Fractional distillation can be used to obtain 96% pure alcohol....