Fick’s Law of Diffusion Formula
1. Fick’s First Law: The formula for Fick’s First Law describes the diffusion flux as proportional to the negative gradient of concentration:
J = -D \frac{\partial \varphi}{\partial x}
Here:
- J is the diffusion flux ([amount of substance] per unit area per unit time),
- D is the diffusion coefficient ([length^2] per unit time),
- φ is the concentration ([amount of substance] per unit volume),
- x is the position.
2. Fick’s Second Law: Fick’s Second Law describes how the concentration changes over time due to diffusion:
\frac{\partial \varphi}{\partial t} = D \frac{\partial^2 \varphi}{\partial x^2}
In this equation:
Fick’s Law of Diffusion
Fick’s Law of Diffusion is an important principle in physics and chemistry. This law describes the rate at which particles (such as molecules, atoms, or ions) diffuse through a medium. It was formulated by Adolf Fick, a German physiologist, in the 19th century. It helps us understand how molecules move and diffuse in space, and in which direction they migrate.
In simple words, Fick’s law states that molecules diffuse in space from a point of higher concentration to a point of lower concentration. In this article, we will learn about all related topics to Fick’s Law of Diffusion. This article includes both the first and second laws along with their derivations. Additionally, we will discuss some common applications of this law.
Table of Content
- What is Diffusion?
- What is Fick’s Law of Diffusion?
- Fick’s Law of Diffusion Formula
- Fick’s First Law of Diffusion
- Fick’s Second Law of Diffusion
- Application of Fick’s Law of Diffusion
- Conclusion
- Sample Problems on Fick’s Law of Diffusion
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