Molecular Diffusion (Liquid)

Last modified by

DavidC

on

Jul 24, 2020, 6:28:07 PM

Created by

DavidC

on

Feb 8, 2014, 8:53:42 PM

$N_A = x_a ( N_A + N_B ) - C * D_m (( deltax_a ) / ( deltaz ))$

$(x_a)"mole fract. of comp. i"$

$(N_A)"Diffusive flux comp. A"$

$(N_B)"Diffusive flux comp. B"$

$(C)"Concentration" "mole"/"volume"$

$(D_m)"Mass diffusivity"$

$(deltax_a)"Change in mole fraction"$

$(deltaz)"Direction"$

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ed413171-40e7-11e3-83ad-bc764e049c3d

The Molecular Diffusion ( $N_A$ ) describes the dispersion of mass. Diffusion explains the flux of molecules (liquid or gas) which cause a gradual mixing of different materials. Diffusive equilibrium is when the concentrations of all materials are equally distributed. This equation uses a R with units of (liter*atm / mol*K). Molecular Diffusion is quantified as diffusive flux measured in units of mole/(time x area).

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