Mass flux with respect to the solvent velocity 

(a) In a system with N chemical species, choose component N to be the solvent. Then define j^N_a = p_a (v_a – V_N) (17C.2-1) to be the mass flux with respect to the solvent velocity. Verify that j^N_a = j_a – (p_a /p_N)j _N (17C.2-2) 

(b) For a binary system (labeling B as the solvent), show that j^B_A = (p/p_B)j_A = –(p²/P_B)D_AB∆ X_A (17C.2-3) How does this result simplify for a very dilute solution of A in solvent B?

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Part (b) AB Part (c) Xg