On the basis of new experimental PVT data and of selected literature values, this paper derives a Martin-Hou equation of state which correlates, within i=O.18% standard deviation, data in the experimental ranges of 25-130°, 10-75 bars, and 1.05-13 cc/g. A vapor pressure equation with six constants describes the data within =t0.18% standard deviation between -45 and +45.64", the critical temperature. A density equation with five constants correlates data between -41 and +42" with a per cent standard deviation of =tO.lO'%. The Martin-Hou equation serves to compute virial coefficients and a variance-covariance matrix treatment indicates their probable accuracy.
The pressure-volume-temperature properties of a 50-50 mole % mixture of monochlorotrifluoromethane and trifluoromethane in the ranges of 14.7 to 74.8 atm., 1.6 to 19.1 cc. per gram, and 298O to 492O K. were correlated, using the Martin-Hou equation of state. Vapor pressures and saturated liquid densities were determined to near the critical temperature (292.6O K.) from 203O and 229.8O K., respectively.
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