In these calculations, we assumed the virial equation of 2 ' = 1 + BP, where B = ylB11 + y2B22 + tjly2812 state (18) (19) for the vapor phase, and UL = x 1 q L + x& for the liquid phase. The P-x data were correlated with polynomials or spline fits as shown in Table 1. I n each of the four cases, convergence was sensitive to the value of p k (the convergence parameter) and to the nature of the P-x equation chosen to fit the data. However, after several trials, each case was satisfactorily solved.The results for the chloroform-ethanol system are shown in Figure 1.

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