Gas Absorption-Problems1 Solving (SO2 Air Mixture)

5000 kg/hr of a SO2-air mixture containing 5% by volume SO2 is to be scrubbed with 200000 kg/hr of water in a packed tower. The exit concentration of SO2 is reduced to 0.15%. The tower operates at 1 atm. The equilibrium relationship is given by Y=30X. Where, Y=(moles SO_2)/(moles air) X=(moles SO_2)/(moles water) If the packed height of the tower is 420 cm estimate the height of the transfer unit.