Example 3

Reevaluate the diffusion coefficient of carbon dioxide in air at 20C and atmospheric pressure using the Fuller, Schettler, and Giddings equation and compare the new value with the one reported in example 2.

The equation is

Molecular weight carbon dioxide

Molecular weight Air

1 mole basis

Total mass

Total Mass = 6.7 + 22.1 = 29 grams

Molecular Weight of Air =

terms from book. For carbon dioxide and Air, the terms were already calculated (Page 491) and included as “Simple Molecules”.

We have all the needed variables to use the Fuller, Schettler, and Giddings equation

Compared to Hirschfelder, Bird, and Spoz at 20C and 1 atm

Compared to the Experimental at 20C and 1 atm

Percent Difference from Predicted Experimental

Precent Difference =

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