a) A stream containing 10% species A by weight starts to flow at a rate of2kg/min into
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a) A stream containing 10% species A by weight starts to flow at a rate of2kg/min into a tank originally holding 300kg of pure B. Simultaneously a valveat the bottom of the tank is opened and the tank contents are also withdrawnat a rate of 2kg/min. considering perfect mixing within the tank, determine thetime required for the exit stream to contain 5% species A by weight. [12]
b) Consider the problem in part (a) as a result of the malfunction of the exitvalve; tank contents are withdrawn at a rate of 2.5kg/min instead of 2kg/min.how long does it take for the exit stream to contain 5% species A in this case.r
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