[2] Analytical evaluation of third and fourth virial coefficients for hard disk fluids in narrow channels and equation of state. Physica A Statistical Mechanics and its Applications (2020).

Kammerlingh-Onnes proposed the virial equation of state shown in Equation 7. 19 20. And B, C, …are not constants but functions of temperature called the second, third,…virial coefficients.

At conditions near ambient, pressure less than 16 psia, the truncated virial equation of state (Equation 1 in the equation box) satisfactorily represents the volumetric behavior of natural gas.

Virial Relations for Nonlinear Wave Equations and Nonexistence of Almost Periodic Solutions R. Pyke Review of Mathematical Physics, Vol. 8, No. 7, pp1001-1039 (1996) . Abstract: A virial relation is ...

References [1] Determination of Second Virial Coefficient of Gold by a Modified Berthelot Equation of State. Journal of Human Earth and Future (2020). [2] Analytical evaluation of third and fourth ...