Absorbing

(12 points) It is desired to absorb acetone with pure water from a gas mixture of acetone in air in a countercurrent stage tower as shown below. If pure water flowrate is 10kgmole/hr, air flowrate is 5kgmole/h,K,a=0.014kgmole/sm3, what is the height of the packed bed shown below? Given: y1=0.03,y2=0.0005,x1=0.005, Henry's law constant H is 1.2. Cross sectional area of the column is 1m2