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Diffusion driving force. Find how large the concentration difference is so that the molar flux of a solute is the same in two films of

Diffusion driving force.

Find how large the concentration difference is so that the molar flux of a solute is the same in two films of equal size. dimensions, but made of two different materials B1 and B2. The diffusion coefficient of solute A in B1 is DAB1 and is greater than in B2, where the diffusivity of the solute is DAB2.

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