Fick's Law of Diffusion Calculator | Life and Earth Sciences

Data Source and Methodology

All calculations are strictly based on Fick's First Law. For more information, refer to the ChemEnggCalc resource. All calculations are based strictly on the formulas and data provided by this source.

The Formula Explained

Fick's Law of Diffusion is expressed as J = -D (dc/dx), where J is the diffusion flux, D is the diffusion coefficient, and dc/dx is the concentration gradient.

Glossary of Variables

Concentration Gradient (dc/dx)

The change in concentration over a specified distance.

Diffusion Coefficient (D)

A measure of how quickly molecules diffuse through a medium.

Diffusion Rate (J)

The rate at which a substance diffuses across a unit area.

How It Works: A Step-by-Step Example

Consider a concentration gradient of 0.1 mol/m³ and a diffusion coefficient of 1.0e-9 m²/s. Using Fick's Law, the diffusion rate is calculated as:

J = -1.0e-9 * 0.1 = -1.0e-10 mol/(m²·s)

Frequently Asked Questions (FAQ)