EXAMPLE $10\mathrm{.}4-1.$ Interface Compositions in Interphase Mass Transfer

The solute A is being absorbed from a gas mixture of A and B in a wetted$-$wall tower with the liquid flowing as a film downward along the wall. At a certain point in the tower the bulk gas concentration $y_{AG}=0\mathrm{.}380$mol fraction and the bulk liquid concentration is $x_{AL}=0\mathrm{.}100.$ The tower is operating at $298K$ and $1\mathrm{.}013{10}^{5}Pa$ and the equilibrium data are as follows: