## Learning Outcomes

After completing this module you should be able to:

- Explain the linear relationship between the rate of movement of a substance and its concentration gradient (Fick’s First Law).
- Measure the rate of movement of a substance from one area to another as a function of the concentration gradient and the diffusion coefficient of that substance in the medium.

1: Measuring movement

2: Directed vs undirected movement

3: Measuring movement using flux

4: Gradients and diffusion

5: Visualising the gradient

6: Fick's First Law

7: The gradient in Fick's First Law

8: A familiar equation for Fick's First Law

9: Graphing Fick's First Law

10: How does flux depend on distance?

11: A fragrant example

12: General transport equations and Fick's First Law

13: Summary