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If the mole fraction of A and B are given as 1/3 and 2/3 respectively and their respective diffusion coefficient are 6 and 3. Calculate the inter-diffusion coefficient (in m2/s)

If the mole fraction of A and B are given as 1/3 and 2/3 respectively and their respective diffusion coefficient are 6 and 3. Calculate the inter-diffusion coefficient (in m2/s) Correct Answer 4

The inter-diffusion coefficient is given by, D’ = DB*XA + DA*XB, (where XA, XB are the mole fractions of A and B and Dᴀ, Dв are their respective diffusion coefficient. Substituting their respective values, we get, D’ = 2 + 2 = 4.

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