Benedict–Webb–Rubin equation

The Benedict–Webb–Rubin equation (BWR), named after Manson Benedict, G. B. Webb, and L. C. Rubin, is an equation of state used in fluid dynamics. Working at the research laboratory of M. W. Kellogg Limited, the three researchers rearranged the Beattie-Bridgeman Equation of State and increased the number of experimentally determined constants to eight.

where ${\displaystyle \rho }$ is the molar density.

A modification of the Benedict–Webb–Rubin equation of state by Professor Kenneth E. Starling of the University of Oklahoma:

where ${\displaystyle \rho }$ is the molar density. The 11 mixture parameters (${\displaystyle B_{0}}$, ${\displaystyle A_{0}}$, etc.) are calculated using the following relations

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