Question

For a binary mixture of species A and B, the molar average velocity is defined as

(a) n a V a + n b V b

(b) n a V a + n b V b/n

(c) n a V a + n b V b/2 n

(d) n a V a + 2 n b V b/n

The question was asked in my homework.

The origin of the question is Concentrations, Velocities and Fluxes topic in division Modes and Diffusion of Mass Transfer

Answer 1

Correct choice is (b) n a V a + n b V b/n

The explanation: n A V A + n B V B/n A + n B = n A V A + n B V B/n.