Acentric Factor and the Heats of Vaporization for Unassociated Polar and Nonpolar Organic Liquids

1979 ◽  
Vol 18 (3) ◽  
pp. 297-298 ◽  
Author(s):  
Jagan Nath
Keyword(s):  
Organic Liquids ◽  
Acentric Factor ◽  
Nonpolar Organic ◽  
Heats Of Vaporization

Separation of Mixtures of Polar and Nonpolar Organic Liquids by Pervaporation and Nanofiltration (Review)

2020 ◽  
Vol 60 (11) ◽  
pp. 1317-1327
Author(s):  
A. A. Yushkin ◽  
G. S. Golubev ◽  
I. A. Podtynnikov ◽  
I. L. Borisov ◽  
V. V. Volkov ◽  
...  
Keyword(s):  
Organic Liquids ◽  
Separation Of Mixtures ◽  
Nonpolar Organic

Additivity methods for estimating heats of vaporization of organic compounds

1983 ◽  
Vol 61 (3) ◽  
pp. 602-607 ◽  
Author(s):  
J. Peter Guthrie ◽  
Kathleen F. Taylor
Keyword(s):  
Standard Deviation ◽  
Organic Compounds ◽  
Correlation Matrix ◽  
Organic Liquids ◽  
Group Additivity ◽  
Group Level ◽  
Parameterization Schemes ◽  
Heats Of Vaporization

Additivity methods for heats of vaporization of organic liquids have been developed using both bond and group additivity parameters. For the bond level parameters, 429 compounds could be fitted using 36 parameters, with a weighted standard deviation of 0.32 kcal/mol, and only 23 deviations of more than 1 kcal/mol. For the group level parameters, 388 compounds could be fitted using 57 parameters, with a weighted standard deviation of 0.19 kcal/mol, and only 7 deviations of more than 1 kcal/mol. The problem of correlation among parameters is discussed and the significant terms in the correlation matrix are given. The new parameters are compared to previous parameterization schemes.

A METHOD FOR THE DETERMINATION OF WATER IN NONPOLAR LIQUIDS; THE SOLUBILITY OF WATER IN BENZENE

1966 ◽  
Vol 44 (12) ◽  
pp. 1361-1367 ◽  
Author(s):  
D. C. Moule ◽  
W. M. Thurston
Keyword(s):  
Isotopic Composition ◽  
Difficult Problem ◽  
Organic Liquids ◽  
Difference Spectroscopy ◽  
Solubility In Water ◽  
Nonpolar Liquids ◽  
Nonpolar Organic ◽  
Low Solubility ◽  
Principal Advantage

A new method is described for the analysis of water in nonpolar organic liquids. It is based on an isotope dilution procedure and involves the exchange of the water present in the sample with D2O. The change in isotopic composition of the D2O is determined by infrared difference spectroscopy. The method appears to be accurate to ± 0.8%.The principal advantage of this method is that the difficult problem of calibration with organic–water standards is avoided. It is restricted, however, to solvents which have a low solubility in water and do not have exchangeable hydrogens.A series of solubility measurements were carried out for H2O in C6H6 from 10 to 60 °C. The data were fitted to the usual interpolation equation In (f/x) = −A/T + B ln T + C, and the thermodynamic functions of solution, ΔG, ΔH, ΔCP, and ΔS, were computed for the transfer of 1 mole of water from the benzene phase to the vapor phase.

Estimation of heats of vaporization for non associating organic liquids from the boiling points at various pressures

1986 ◽  
Vol 64 (4) ◽  
pp. 635-640 ◽  
Author(s):  
J. Peter Guthrie
Keyword(s):  
Heat Capacity ◽  
Vapor Pressure ◽  
Boiling Point ◽  
Room Temperature ◽  
Quadratic Function ◽  
Organic Liquids ◽  
Heat Of Vaporization ◽  
Boiling Points ◽  
Temperature And Pressure ◽  
Heats Of Vaporization

At any pressure the heat of vaporization can be expressed as a quadratic function of the boiling point at that pressure. A seven parameter equation expressing the simultaneous dependence on boiling point and pressure can be fitted to the data; six pressures from 1 to 760 Torr (1 Torr = 133.3 Pa) were used. ΔHvap = b11 + b12 In (p) + b13p + (b21 + b22 In (p))tbp + (b31 + b32 In (p))tbp2. This relationship served as a guide for developing a relationship between vapour pressure at 25 °C and the calorimetric heat of vaporization, and also a relationship between vapor pressure at 25 °C and the boiling point at some other pressure. Parameters for both these relationships could be derived from the parameters obtained for ΔHvap as a function of temperature and pressure. A third method was developed starting from an equation for vapor pressure and fitting to the heat of vaporization, the heat capacity of vaporization, and at least one t,p point. These methods allow the estimation of the vapor pressure at room temperature from very meager data. The problems of errors in estimated values are discussed.

Wettability of Wool Fibers

1976 ◽  
Vol 46 (10) ◽  
pp. 720-723 ◽  
Author(s):  
B. O. Bateup ◽  
J. R. Cook ◽  
H. D. Feldtman ◽  
B. E. Fleischfresser
Keyword(s):  
Surface Tension ◽  
Corona Discharge ◽  
Atmospheric Pressure ◽  
Organic Liquids ◽  
Critical Surface ◽  
Critical Surface Tension ◽  
Lipid Material ◽  
Wool Fibers ◽  
Aqueous Surfactants ◽  
Nonpolar Organic

The critical surface tension of wool fibers was measured using the sink-float technique with various classes of test liquids. Nonpolar organic liquids and aqueous surfactants gave similar values of γ, but much lower values were obtained with butanol/water mixtures. Adsorption of butanol on the surface of the fibers is thought to be responsible for the low values of γ in the latter case. Removal of lipid material from the surface of fibers by extraction increases γ from 30 mN/m to 37 mN/m, similar to that obtained for horn keratin or polypeptide material. Exposure of fibers to a corona discharge in air at atmospheric pressure also increases γ.

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