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Real Gases

The critical ...

Question

The critical temperature and critical pressure of a gas are $31^{\circ} C$ and $728$ atmosphere respectively. Calculate the constants $^{'} a^{'}$ and $^{'} b^{'}$ .

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Solution

$P_{c} = 728 a t m$ $T_{c} = 31^{\circ} C$
$a = \frac{27 R^{2} T c^{2}}{69 p_{C}} = 0.360$
$b = \frac{R \times T c}{8 P c} = 0.0072$

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