compressed liquid densities for binary mixtures at temperatures from 280- 440k at pressures up to 200 mpa

a method for predicting liquid densities of binary mixtures from heat of vaporization and liquid densityat boiling point temperature (δhvap and n b ρ ) as scaling constants, is presented. b2(t) follows a promisingcorresponding-states principle. calculation of α(t) and b(t), the two other temperature-dependentconstants of the equation of state, are made possible by scaling. as a result δhvap and n b ρ are sufficient fordetermination of thermophysical properties of liquid mixtures. we applied the procedure to predict liquiddensities of (x1 n-butane + x2 isobutane) at compressed state with temperature range from 280 to 440 k andpressures up to 200 mpa. the experimental liquid densities were correlated satisfactory with our procedureand the results are within 5%.