Question: Mass transfer problem. (Hines and Maddox) 2.12 Activity coefficients for several solutions can be predicted with reasonable accuracy with Margules equation given by lnA=xA2[AAB+2(ABAAAB)xA]. (a)

Mass transfer problem. (Hines and Maddox)

Mass transfer problem. (Hines and Maddox) 2.12 Activity coefficients for several solutions

2.12 Activity coefficients for several solutions can be predicted with reasonable accuracy with Margules equation given by lnA=xA2[AAB+2(ABAAAB)xA]. (a) Combine the equations of Margules and Vignes to obtain an expression for the difiusion coefficient as a function of concentration, and (b) calculate the difiusion coefficient for a 50mol% mixture of ethanol-water at 25C. Compare your answer with the value given in Example 2.4. AAB=0.6848, and ABA=0.3781

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