| Abstract: | A Burnett-type apparatus was used to obtain compressibility factors of methanol vapor at temperatures from 25° to 200°C at 25° intervals and at pressures below the saturation pressure at each temperature. The accuracy of measurements in the compressibilities was 0.1% or less from 25° to 175°C and 0.3% at 200°C. An elaborate graphical smoothing procedure was followed to obtain smoothed, internally consistent values of compressibility factors. These smoothed values were then used to calculate vapor volumes, Berlin virial coefficients, Stockmayer force constants, thermodynamic properties, and equilibrium constants of formations of dimers, trimers, and tetramers using Wooley's model. These equilibrium constants were then utilized to calculate the enthalpy and the entropy of polymerization for all the isomeric species. Using the appropriate data and equations, the mole fractions of the various polymeric species in the gaseous phase as a function of temperature and pressure were calculated. The compressibility factors were also used to test the polar correlation of Eubank and Smith. |
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