Benedict-Webb-Rubin PVT equation

Input(s)

R: Gas Constant (BTU/mol psi K)

$\mathrm{T}$ : Temperature $(\mathrm{K})$

$\rho$ : Density $(\mathrm{g} / \mathrm{cc})$

A: Correlation Constant (dimensionless)

B: Correlation Constant (dimensionless)

C: Correlation Constant (dimensionless)

a: Correlation Constant (dimensionless)

b: Correlation Constant (dimensionless)

c: Correlation Constant (dimensionless)

$\alpha$ : Correlation Constant (dimensionless)

$\gamma$ : Correlation Constant (dimensionless)

P: Pressure (psi)

\begin{aligned} \mathrm{P} & =\mathrm{R} * \mathrm{~T} * \rho+\left(\left(\mathrm{B} * \mathrm{R} * \mathrm{~T}-\mathrm{A}-\frac{\mathrm{C}}{\mathrm{T}^{2}}\right) *\left(\rho^{2}\right)\right)+\left(\rho^{3}\right) *(\mathrm{~b} * \mathrm{R} * \mathrm{~T}-\mathrm{a})+\mathrm{a} * \alpha *\left(\rho^{6}\right)+\left(\mathrm{c} * \frac{\rho^{3}}{\mathrm{~T}^{2}}\right) *\left(1+\gamma *\left(\rho^{2}\right)\right) \\ & * \exp \left((-1) * \gamma *\left(\rho^{2}\right)\right) \end{aligned}

John M. Campbell, Gas Conditioning and Processing, Campbell Petroleum Series, Oklahoma, 1992, Vol. 1, Page: 48.