An ethanol (A) water (B) solution in the form of a stagnant film 2.0 mm thick at 293 K is in contact at one surface with an organic solvent in with ethanol is soluble. At point 1 ethanol is 16.8wt% and the density =972.8 kg/m3 .At point 2 the ethanol is 6.8wt% and density = 988.1kg/m3. Diffusivity of ethanol is 0.74*10-9 m2/s . Calculate the NA flux.

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