Question

A reactor is supplied with C6H12O6 and the following reactions occur C6H12O6 -> 2C2H5OH + 2CO2 and C6H12O6 –> 2C2H3CO2H + 2H2O, 360 grams of pure glucose is supplied and 44 grams of CO2 was produced, what 90 grams of glucose left unreacted, how many grams of ethanol was produced?

(a) 23

(b) 46

(c) 92

(d) 186

I got this question in final exam.

This interesting question is from Processes Involving Multiple Units topic in section The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

Answer 1

Correct choice is (b) 46

Explanation: Moles of glucose reacted in first reaction = 90/180 = 0.5, => weight of ethanol produced = 2*0.5*46 = 46 grams.