Chapter 14: External Diffusion Effects on Heteregeneous Reactions
\( W_A = C_A V_A \)
Where VA is the particle velocity of A which is the vector average of millions of A molecules at a point. VA is the velocity wrt to a stationary coordinate, e.g., the lab bench.
\( B_A = C_A V = y_A C_T V \)
where V is the molar average velocity of all species
\( V = y_A V_A + y_B V_B \)
multiplying by the total concentration.
\( C_T V = C_A V_A + C_B V_B = (W_A + W_B) \)
\( B_A = y_A (W_A + W_B) \)
\( W_A = J_A + B_A \)
JA tells us of the flux of A with respect to the molar average velocity.
\( W_A = J_A + y_A (W_A + W_B) \)