Second virial coefficients of binary mixtures of benzene with methanol, ethanol, acetone, and diethyl ether

1968 ◽  
Vol 13 (3) ◽  
pp. 312-317 ◽  
Author(s):  
D. H. Knoebel ◽  
W. C. Edmister
Keyword(s):  
Binary Mixtures ◽  
Diethyl Ether ◽  
Virial Coefficients ◽  
Second Virial Coefficients

The second virial coefficients of mixed organic vapours

1952 ◽  
Vol 210 (1103) ◽  
pp. 557-564 ◽  
Keyword(s):  
Hydrogen Bonding ◽  
Binary Mixtures ◽  
Diethyl Ether ◽  
Virial Coefficient ◽  
Second Virial Coefficient ◽  
Virial Coefficients ◽  
Corresponding States ◽  
Linear Variation ◽  
Second Virial Coefficients

The second virial coefficients of some binary mixtures of organic vapours have been measured at temperatures between 50 and 120° C. Mixtures of n -hexane with chloroform and of n -hexane with diethyl ether show a linear variation of second virial coefficient with composition. This is shown to be in accordance with prediction from the principle of corresponding states. Mixtures of chloroform with diethyl ether show a linear variation at 120° C, but pronounced curvature at lower temperatures. This is interpreted quantitatively as being due to association by hydrogen bonding with an energy of 6020 cal/mole.

Second virial coefficients of fluorinated methanes CH4−xFx(x = 0–4) and their binary mixtures

2002 ◽  
Vol 4 (18) ◽  
pp. 4444-4448 ◽  
Author(s):  
Joachim A. Lamp ◽  
Bernhard F. Schramm ◽  
Shokry M. Saad ◽  
Samia A. El-Geubeily
Keyword(s):  
Binary Mixtures ◽  
Virial Coefficients ◽  
Second Virial Coefficients

scholarly journals The second virial coefficients of organic vapours

1949 ◽  
Vol 196 (1044) ◽  
pp. 113-125 ◽  
Keyword(s):  
Thermal Conductivity ◽  
Hydrogen Bonding ◽  
Carbon Tetrachloride ◽  
Diethyl Ether ◽  
Methyl Alcohol ◽  
Virial Coefficients ◽  
Dipole Interaction ◽  
Conductivity Data ◽  
Second Virial Coefficients ◽  
Critical Data

The compressibilities of a num ber of organic vapours have been measured at pressures up to 1 atm. and temperatures ranging from 40 to 130° C. The observed second virial coefficients are compared with values calculated from the critical data by the Berthelot equation. The results show two distinct classes of behaviour. Class I is shown by ethane, ethylene, n -hexane, cyclohexane, benzene, diethyl ether, ethyl chloride, chloroform and carbon tetrachloride, where the measured second virial coefficients are in agreement with the calculated values. Class II by acetaldehyde, acetone, acetonitrile, methyl alcohol, where the measured second virial coefficients are consistently very much higher than the calculated values. It is concluded that the vapours of polar substances for which the energy of attraction between molecules, due to dipole interaction or to hydrogen bonding, is larger than kT undergo dim erization. This view is supported by thermal conductivity data. The range of validity of the Berthelot equation for both non-polar and polar vapours is examined.

Thermal conductivities of organic vapours

1950 ◽  
Vol 200 (1061) ◽  
pp. 262-271 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Thermal Conductivity ◽  
Diethyl Ether ◽  
Methyl Alcohol ◽  
Virial Coefficients ◽  
Second Virial Coefficients ◽  
Reversible Dimerization ◽  
Quantitative Explanation ◽  
Dimerization Process ◽  
Quantitative Treatment

The variation of thermal conductivity with pressure has been investigated for a number of organic vapours at pressures between 50 and 700 mm. and at temperatures of 25, 66 and 85° C. Acetaldehyde and acetonitrile show fairly large linear increases of thermal conductivity with rise in pressure, which diminish markedly as temperature rises. This is interpreted as being due to dimerization, and a quantitative treatment is given in terms of values of K p and ∆ H for the reversible dimerization process, which are derived from previous work on the second virial coefficients of these vapours. Ethyl chloride shows similar behaviour to a much smaller degree. Methyl alcohol and acetone show fairly large non-linear increases, which diminish at higher temperatures, and which are interpreted as being due to association to polymers higher than the dimer. Benzene, cyclohexane, n -hexane, chloroform and diethyl ether, together with air and carbon dioxide, all show comparatively small linear increases, which become larger as temperature rises. No satisfactory quantitative explanation was found for this effect, which appears to involve factors other than simple convection. Values of the absolute thermal conductivity, corrected to zero pressure, are given for all vapours investigated.

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