Computation of Vapor-Liquid Equilibrium Data from Solution Vapor Pressure Measurements

1965 ◽  
Vol 4 (4) ◽  
pp. 455-459 ◽  
Author(s):  
F. O. Mixon ◽  
Bogdan Gumowski ◽  
B. H. Carpenter
Keyword(s):  
Vapor Pressure ◽  
Pressure Measurements ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Equilibrium Data ◽  
Vapor Pressure Measurements ◽  
Vapor Liquid

scholarly journals Thermophysical Properties of the Lennard-Jones Fluid: Database and Data Assessment

2021 ◽  
Author(s):  
Simon Stephan ◽  
Monika Thol ◽  
Jadran Vrabec ◽  
Hans Hasse
Keyword(s):  
Heat Capacity ◽  
Vapor Pressure ◽  
Enthalpy Of Vaporization ◽  
Data Sets ◽  
Saturated Liquid ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Lennard Jones ◽  
Equilibrium Data ◽  
Vapor Liquid

Literature data on the thermophysical properties of the Lennard-Jones fluid, which were sampled with molecular dynamics and Monte Carlo simulations, were reviewed and assessed. The literature data were complemented by simulation data from the present work that were taken in regions in which previously only sparse data were available. Data on homogeneous state points (for given temperature T and density ρ: pressure p, thermal expansion coefficient α, isothermal compressibility β, thermal pressure coefficient γ, internal energy u, isochoric heat capacity cv, isobaric heat capacity cp, Grüneisen parameter Γ, Joule–Thomson coefficient μJT, speed of sound w, Helmholtz energy a, and chemical potential) were considered, as well as data on the vapor–liquid equilibrium (for given T: vapor pressure ps, saturated liquid and vapor densities ρ′ and ρ″, respectively, enthalpy of vaporization Δhv, and as well as surface tension γ). The entire set of available data, which contains about 35 000 data points, was digitalized and included in a database, which is made available in the Supporting Information of this paper. Different consistency tests were applied to assess the accuracy and precision of the data. The data on homogeneous states were evaluated pointwise using data from their respective vicinity and equations of state. Approximately 10% of all homogeneous bulk data were discarded as outliers. The vapor–liquid equilibrium data were assessed by tests based on the compressibility factor, the Clausius–Clapeyron equation, and by an outlier test. Seven particularly reliable vapor–liquid equilibrium data sets were identified. The mutual agreement of these data sets is approximately ±1% for the vapor pressure, ±0.2% for the saturated liquid density, ±1% for the saturated vapor density, and ±0.75% for the enthalpy of vaporization—excluding the region close to the critical point.

Vapor–liquid equilibrium studies of n-propanol–n-decanol mixtures

1968 ◽  
Vol 46 (12) ◽  
pp. 2065-2069 ◽  
Author(s):  
Jaswant Singh ◽  
G. C. Benson
Keyword(s):  
Vapor Pressure ◽  
Similar Data ◽  
Pressure Measurements ◽  
Free Energies ◽  
Liquid Equilibrium ◽  
Equilibrium Studies ◽  
Vapor Liquid Equilibrium ◽  
Temperature Range ◽  
Molar Excess ◽  
Vapor Pressure Measurements

Static vapor pressure measurements were made on mixtures of n-propanol with n-decanol over the temperature range 20–50 °C. From the results, the molar excess Gibbs free energies were calculated. The applicability of the principle of congruence to these values and to similar data published previously for methanol–decanol and ethanol–decanol systems was examined.

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