An alternative form of the virial equation of state, truncated after the third virial coefficient is written as [Pg.67]

At moderate pressures, the virial equation of state, truncated after the second virial coefficient, can be used to describe the vapor phase. As suggested by Hirschfelder, et. al. (1 3) the temperature dependence of the virial coefficients is expressed [Pg.732]

The pressure virial equation of state was shown in Eq. (1.3-4), and it was shown in an example that A2, the second pressure virial coefficient, is equal to B2, the second virial coefficient. Find an expression for (dS/dP)j- for a gas obeying the pressure virial equation of state truncated at the A2 term. [Pg.165]

Derive equations to calculate the enthalpy departure using each of the following methods (a) the ideal gas equation, (b) the virial equation of state truncated after the second virial coefficient, (c) the Soave-Redlich-Kwong equation of state. [Pg.70]

At modest vapor densities, our most useful tool for vapor-phase fugacity coefficients is the virial equation of state truncated after the second term. For real fluids, much is known about second virial [Pg.27]

Semiempirical Relationships. Exact thermodynamic relationships can be approximated, and the unknown parameters then adjusted or estimated empirically. The virial equation of state, truncated after the second term, is an example of such a correlation (3). [Pg.232]

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