Pitzer equation

Pitzer equation

[′pit·sər i‚kwā·zhən]
(physical chemistry)
Equation for the approximation of data for heats of vaporization for organic and simple inorganic compounds; derived from temperature and reduced temperature relationships.
References in periodicals archive ?
Therefore, there is room for some improvements based on two constraints: first, to improve the Pitzer equation without modifying its analytical form; second, to restrict the input parameters required to apply the new Pitzer relation to the normal boiling temperature and critical values only.
The Pitzer equation for the calculation of the second virial coefficients of pure compounds, written in its more updated form according to Tsonopoulos (Prausnitz et al., 1999) is:
Activity coefficients are determined either using either an extended version of the Debye-Huckel equation (Truesdell and Jones 1974), or at high ionic strength, Pitzer equations (Pitzer 1973).