9. Liquid water and air flow into a humidification chamber where water evaporates completely. The air stream enters the chamber with a composition of 1.00 mol% H2O and 20.8% O2, the balance consists of N2. The humidified air exits as humidifier with a composition of 10.0 mol% H2O. Calculate the volumetric flow rate (cm3/min) of water required to humidify 200 mol/min of the entering air.

 

10. Whole milk contains around 4.5% fat. Skimmed milk is prepared by the removal of some of the fat from whole milk. The skimmed milk is found to contain 0.1% fat. It is desired to prepare 100 kg of skimmed milk from original whole milk. Assuming that fat only was removed to make the skimmed milk, calculate the mass of the removed fat.

 

3) An air conditioner is used to cool and dehumidify air. Wewill ignore the temperature
aspect and model the air conditioner as a partial condenser. Humidair can be considered
a mixture of two components: dry air and water vapor. Fresh feedair containing 3.00%
water entering at a rate of 50.0 kg/min is mixed with a recyclestream of previously dehumidified air. All compositions aremeasured by mass. The mixture enters a
condenser that removes a portion of the water in one stream (aspure liquid water). The
second stream exiting the condenser contains air of lower humidity,specifically 1.50%
water. 70.0% of that air is recycled, as mentioned earlier, and therest is delivered to a
house.
(A) Carefully and completely label the flowchart for thisprocess.
(B) Calculate the rate of water removal from the condenser, therate of dehumidified
(1.50% water) air delivered to the house, and the flow rate andcomposition of the humid
air entering the condenser

A chemical process requires a stream of humidified air at constant conditions. to achieve this, 100mol/hr of dry air is bubbled through a closed container that is initially charged with 5L of pure water. the temperature of the unit can be adjusted as needed to provide a constant T.

The outlet stream from the container contains all of the air fed to the unit, as well as some fraction of the water. If the mole fraction of water in the humidified air stream must be kept constant at 25%, what temperature must the humidification unit be kept at to achieve the desired outlet composition. You may assume that the air does not enter the water phase to any appreciable degree. (use raoults law then antiones eqution with A=9.07131, B=1730.63, and C=233.426)

1.Wet air containing 60.4 mol% of pure water at 82.5˚C is fed to a dehumidifier at a rate of 185 mol/hr. Outlet of the dehumidifier consists of 2 streams – one stream of drier air and the other stream is pure liquid water. The outlet streams are in vapor-liquid equilibrium at 812 mmHg and 31.7oC. a)Draw the process flow diagram, number the streams, and label the components in each stream. b)Find the component mole flow rates (mol/hr) exiting the dehumidifier. c)If the temperature of the inlet wet air increases by 10oC, will the molar flow rate of liquid water exiting the dehumidifier increase, decrease, or stay the same? Justify your answer.