. A 0.1 mole% caustic soda (NaOH) solution is to be concentrated in a continuous
Chapter 8, Problem 8.101(choose chapter or problem)
. A 0.1 mole% caustic soda (NaOH) solution is to be concentrated in a continuous evaporator. The solution enters the unit at 25C at a rate of 150 mol/min and is concentrated to 5 mole% at 60C. Hot dry air at 200C and 1.1 bar absolute is bubbled through the evaporator and leaves saturated with water at 60C and 1 atm. Calculatethe required volumetricflow rate ofthe entering air andthe rate at which heat must betransferredto or from the unit. Assume that the heat capacity per unit mass of all liquid solutions is that of pure water.
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