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A reactor is supplied with 20 moles of C, and it undergoes following reactions C + 0.5O2 -> CO and C + O2 -> CO2, if 10 moles of CO2 was produced and 5 moles of C remains unreacted, what are the number of moles of CO produced?(a) 1(b) 3(c) 5(d) 7This question was addressed to me by my college director while I was bunking the class.My question is taken from Processes Involving Multiple Units in section The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

Answer»

Right OPTION is (c) 5

The BEST explanation: Extent of SECOND reaction = (10 – 0)/1 = 10, => MOLES of C reacted in second reaction = 10*1 = 10, => moles of C reacted in first reaction = 20 – 10 – 5 = 5, => extent of first reaction = (0 – 5)/(-1) = 5, => moles of CO produced = 5*1 = 5.


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