Excess second virial coefficients and mixture critical temperatures of diethyl ether and methyl acetate

1990 ◽  
Vol 35 (4) ◽  
pp. 427-429 ◽  
Author(s):  
Peter J. McElroy ◽  
Gary A. Robertson ◽  
Samad S. Kolahi
Keyword(s):  
Diethyl Ether ◽  
Methyl Acetate ◽  
Virial Coefficients ◽  
Critical Temperatures ◽  
Second Virial Coefficients

Excess second virial coefficients and critical temperatures: Acetone+ methyl acetate

AIChE Journal ◽  
1983 ◽  
Vol 29 (6) ◽  
pp. 1007-1010 ◽  
Author(s):  
P. J. McElroy ◽  
H. Hashim ◽  
Wong Loke Tatt
Keyword(s):  
Methyl Acetate ◽  
Virial Coefficients ◽  
Critical Temperatures ◽  
Second Virial Coefficients

The second virial coefficients of mixed polar vapours

1959 ◽  
Vol 249 (1258) ◽  
pp. 414-426 ◽  
Keyword(s):  
Methyl Acetate ◽  
Virial Coefficient ◽  
Methyl Formate ◽  
Second Virial Coefficient ◽  
Virial Coefficients ◽  
Ethyl Formate ◽  
Carbonyl Oxygen ◽  
Second Virial Coefficients ◽  
Theoretical Significance ◽  
Boyle’S Law

The second virial coefficients of binary mixtures of chloroform with methyl formate, n -propyl formate, methyl acetate, ethyl acetate and diethylamine have been measured in a ‘Boyle’s law apparatus’ at temperatures between 50 and 95 °C. The measured values are consistently higher than predicted by the theory of corresponding states, and a quantitative interpretation is proposed, based on the hypothesis that the esters and amine are partially dimerized and are involved in association with the chloroform by hydrogen bonding. A linear relation is shown to exist between the heats and entropies of association for the various mixtures, and the theoretical significance of this is discussed. There is some evidence that hydrogen bonds are formed through the alkoxyl oxygen by formate esters and through the carbonyl oxygen by acetate esters. The paper includes data on the second virial coefficient for the pure esters and for ethyl formate and methyl propionate.

Upper critical solution temperatures of hydrocarbon + fluorocarbon mixtures

1978 ◽  
Vol 31 (1) ◽  
pp. 19 ◽  
Author(s):  
CP Hicks ◽  
RL Hurle ◽  
LS Toczylkin ◽  
CL Young
Keyword(s):  
Reasonable Agreement ◽  
Fluid Model ◽  
Virial Coefficients ◽  
Temperature Data ◽  
Solution Temperature ◽  
Critical Temperatures ◽  
Critical Solution Temperature ◽  
Second Virial Coefficients ◽  
Upper Critical Solution Temperature ◽  
Critical Solution Temperatures

Values of the interaction parameter ξ have been calculated from upper critical solution temperature data by use of the van der Waals one- fluid model for a range of hydrocarbon+fluorocarbon mixtures. The values obtained are compared with values calculated from gas-liquid critical temperatures and mixed second virial coefficients where experimental data on these properties are available. The overall agreement between calculated from these properties is only fair but there is reasonable agreement between ξ calculated from gas-liquid critical temperatures and upper critical solution temperatures for mixtures of quasi-spherical molecules. ��� Experimental upper critical solution temperatures are reported for 26 systems which have not been studied previously. Gas-liquid critical temperatures of four systems are reported.

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.

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.

Sign in / Sign up

Export Citation Format

Share Document