Testing of vapor-liquid equilibrium data for thermodynamic consistency Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/n583xx57m

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  • Redlich and Kister have developed two methods for evaluating thermodynamic consistency of vapor-liquid equilibrium data. These same authors also developed a power series for classifying systems according to the number of coefficients required to define the data. Stockett found it was difficult to classify systems by this method. Macan suggested that the power series be replaced by a series of orthogonal polynomials, namely the Legendre polynomials, which Macan found to represent the data better. Unfortunately when evaluating these series for the area test, only the magnitude is obtained. The I. B. M. 1620 digital computer was used to check the thermodynamic consistency of seventy-two sets of experimental data. The results of this investigation indicated that the majority of the data satisfied the slope test, but did not satisfy the area test. It was also found that the percentage of the area, as well as the magnitude should be used in evaluating the area test.
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