A porous membrane initially contains solute A with concentration CA0. One side of the membrane is suddenly brought into contact with a gas and the concentration...

4.2 A porous membrane initially contains solute A with concentration Cad. One side of the membrane is suddenly brought into contact with a gas and the con- centration of A on the surface is raised to Cal (see Figure 4-21). The concentration of A on the other surface is held constant at C40. Obtain an expression for the concentration profile of A in the membrane. 1 CAI CAO CAO Figure 4-21 Problem 4.2: diffusion through a membrane Z = 0 Z = L