Question: Species A is evaporating from a flat surface into species B. Assume that the concentration profile for species A in the concentration boundary layer is

Species A is evaporating from a flat surface into species B. Assume that the concentration profile for species A in the concentration boundary layer is of the form CA(y) = Dy2 + Ey + F, where D, E, and F are constants at any x location and y is measured along a normal from the surface. Develop an expression for the mass transfer convection coefficient hm in terms of these constants, the concentration of A in the free stream CA,∞ and the mass diffusivity DAB, Write an expression for the molar flux of mass transfer by convection for species A.

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