Transport mechanisms

Introduction
Molecular diffusion in a medium
Transfer accross phase boundaries
Examples for application
Advective and dispersive transport
References and links

Selftest
Problems
     Problem 1
           Hint
           Answer
     Problem 2
           Hint
           Answer
     Problem 3
           Answer
     Problem 4
     Problem 5

Problem 5

For calculations of the decline of the mass of a chemical in a compartment due to a diffusion process (see "Diffusion.xls", sheets semi-infinite column (2)" and "spherical diffusion") one can often find first order kinetics being applied. Is that correct?

Fit the results from "Diffusion.xls", sheets "semi-infinite column (2)" and "spherical diffusion" for an arbitrary case with a log-linear or exponential regression.

 

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