1.

What is the percentage of excess air if 50 grams of air is in excess and 150 grams of air enters the process?(a) 10%(b) 25%(c) 50%(d) 100%This question was addressed to me in an interview.The query is from Material Balances Involving Combustion in chapter The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

Answer»

The correct answer is (c) 50%

Best explanation: Percentage of excess AIR = 100*50/(150 – 50) = 50%.



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