In Matlab:
Here are your compounds' formulae and names: No. Formula Name ---------------------------------------- 1 Ar argon 2 O2 oxygen >> help dcalc Chapman-Enskog formula for mass diffusivity coefficient for binary mixtures function D = dcalc(p,T,index) Argument List: p [=] pressure in kPa T [=] temperature in the units of Tdeg index [=] index of 2 compounds in cnms whose Dab is to be found (If this argument is omitted, Dab will be found for the first 2) Returns: D [=] mass diffusivity in units of m2/s Ex: >> clear >> start402 >> d = dcalc(0.0099, 298, [1 2]) d = 1.8961e-05 Created 3/21/95-2 Jim Lee >> dcalc(101.325,293.2) ans = 1.8818e-05 >> ans*1e4 <-- Changing to cp ans = 0.1882 in cm^2/s Compare to answer found with Maple