Fick's Law Calculator

Molar flux from concentration gradient

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Fick's Law

Molar flux from concentration gradient

$$J_A=D_{AB}\dfrac{C_{A1}-C_{A2}}{\Delta z}$$

Gases: $D_{AB}\sim10^{-5}\ \text{m}^2/\text{s}$. Liquids: $\sim10^{-9}\ \text{m}^2/\text{s}$.

D_AB (m²/s)

C_A1 (mol/m³)

C_A2 (mol/m³)

Δz (m)

All fields required; Δz nonzero.

Molar Flux J_A

—mol/m²·s

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