Reevaluate the diffusion coefficient of carbon dioxide in air at [latex]20^{\circ} \mathrm{C}[/latex] and atmospheric pressure using the Fuller, Schettler, and Giddings equation and compare the new value with the one reported in example 2 .

[latex] \begin{aligned} D_{A B} & =\frac{10^{-3} T^{1.75}\left(\frac{1}{M_{A}}+\frac{1}{M_{B}}\right)^{1 / 2}}{P\left[\left(\sum v\right)_{A}^{1 / 3}+\left(\sum v\right)_{B}^{1 / 3}\right]^{2}} \\ & =\frac{10^{-3}(293)^{1.75}\left(\frac{1}{44}+\frac{1}{29}\right)^{1 / 2}}{(1)\left[(26.9)^{1 / 3}+(20.1)^{1 / 3}\right]^{2}} \\ & =0.152 \mathrm{~cm}^{2} / \mathrm{s} \end{aligned} [/latex] This value compares very favorably to the value evaluated with Hirschfelder equation, [latex]0.155 \mathrm{~cm}^{2} / \mathrm{s}[/latex], and its determination was easily accomplished.

Question 24.3: Reevaluate the diffusion coefficient of carbon dioxide in ai...

Fundamentals of Momentum, Heat, and Mass Transfer

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

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