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Phase Transformations

Problem 2.198

Calculate the Van der Waals constants for carbon dioxide if its critical temperature \(T_{c r}=304 \mathrm{~K}\) and critical pressure \(p_{\mathrm{cr}}\) \(=73\) atm.

Reveal Answer
 2.198. a=27/64R2Tcr2/pcr=3.6 atm⋅12/mol2,b=1/8RTcr/pcr==0.043l/mol\begin{array}{l} \text { 2.198. } a=27 / 64 R^{2} T_{c r}^{2} / p_{c r}=3.6 \mathrm{~atm} \cdot 1^{2} / \mathrm{mol}^{2}, \quad b=1 / 8 R T_{\mathrm{cr}} / p_{c r}= \\ =0.043 \mathrm{l} / \mathrm{mol} \end{array}
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