Boynton and Bramley equation of state

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The Boynton and Bramley equation of state is given by [1]

\left( p + \frac{a}{V^2}\right) (V-b) = \frac{RT}{\left(1+ \frac{\psi^2}{T^2}\right)}

where \psi is a characteristic temperature. and where:

For this equation at the critical point one has

\frac{RT_c}{p_cV_c} = \frac{8}{3}\left( 1 + \frac{\psi^2}{T_c^2}\right)

References[edit]