A wetted-wall column consists of a vertical solid cylinder, 2.5 cm in diameter and 10.0 cm tall. Pure water at 25°C flows down the outer surface of the cylinder at the rate of 10.0 cm³/s. The column is placed in an atmosphere of pure CO2 at 25°C and 1 atm absolute pressure. Assuming steady state and that the flow is laminar, determine:

(a) The average mass transfer coefficient for CO₂ absorption in the wetted-wall column.

(b) The mixing-cup average concentration of CO₂ in the liquid leaving the wettedwall column.

(c) The rate of mass transfer of CO₂ into the film.