Virial expansion
Series expansion of the equation of state for a many-particle system / From Wikipedia, the free encyclopedia
The virial expansion is a model of thermodynamic equations of state. It expresses the pressure P of a gas in local equilibrium as a power series of the density. This equation may be represented in terms of the compressibility factor, Z, as
This equation was first proposed by Kamerlingh Onnes.[1] The terms A, B, and C represent the virial coefficients. The leading coefficient A is defined as the constant value of 1, which ensures that the equation reduces to the ideal gas expression as the gas density approaches zero.
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