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Binary Diffusion Coefficients for Gases

​
A
O
2
B
CO
2
T (K)
296
p (atm)
1
AB
​(T,P) Contour Plot
Binary diffusion coefficients
AB
at low to moderate pressures (such that the ideal gas behavior is valid) can be predicted with reasonable accuracy (to within about 5% of experimental data) from the kinetic theory of gases using results from the Chapman–Enskog theory based on the Lennard–Jones (6-12) potential [1].
In this Demonstration, you can select a pair of molecules from the pull-down menus and then use the sliders to select a temperature and pressure for the process. The binary diffusion coefficient for the selected gas pair is shown in a
AB
contour plot. You can also view the binary mixture parameters and the molecular parameters for the selected binary mixture.
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