Thermodynamic properties of binary systems containing hexafluorobenzene. Part 2.—Excess volumes of mixing and dipole moments

1966 ◽  
Vol 62 (0) ◽  
pp. 1090-1096 ◽  
Author(s):  
W. A. Duncan ◽  
J. P. Sheridan ◽  
F. L. Swinton
Keyword(s):  
Thermodynamic Properties ◽  
Binary Systems ◽  
Dipole Moments ◽  
Excess Volumes ◽  
Volumes Of Mixing

Thermodynamic properties of binary liquid mixtures

1976 ◽  
Vol 54 (14) ◽  
pp. 2280-2282 ◽  
Author(s):  
Murari Venkata Prabhakara Rao ◽  
Puligundla Ramachandra Naidu
Keyword(s):  
Statistical Theory ◽  
Thermodynamic Properties ◽  
Binary Mixtures ◽  
Binary Systems ◽  
Liquid Mixtures ◽  
Excess Volumes ◽  
Diethyl Ketone ◽  
Binary Liquid ◽  
The Third ◽  
Heats Of Mixing

Excess volumes of the three binary mixtures: (1) cyclohexane – diethyl ketone, (2) cyclohexane–benzonitrile, and (3) toluene–benzonitrile have been measured at 303.15 K using a dilatometer. Excess volumes of the first two systems are positive over the whole range of composition and are negative for the third system. The measured excess volumes and the excess heats of mixing reported in the literature for the three binary systems have been analysed in the light of the statistical theory of liquid mixtures developed by Flory. The analysis has shown that the theory in its modified form is approximately applicable to the mixtures cyclohexane–diethylketone and cyclohexane–benzonitrile.

Calculation of phase diagrams and thermodynamic properties of 14 additive and reciprocal ternary systems containing Li2CO3, Na2CO3, K2CO3, Li2SO4, Na2SO4, K2SO4, LiOH, NaOH, and KOH

1984 ◽  
Vol 62 (3) ◽  
pp. 457-474 ◽  
Author(s):  
A. D. Pelton ◽  
C. W. Bale ◽  
P. L. Lin
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Molten Salt ◽  
Phase Diagrams ◽  
Binary Systems ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Ternary Systems ◽  
Maximum Error ◽  
Critical Assessment

Phase diagrams and thermodynamic properties of five additive molten salt ternary systems and nine reciprocal molten salt ternary systems containing the ions Li+, Na+, [Formula: see text], OH− are calculated from the thermodynamic properties of their binary subsystems which were obtained previously by a critical assessment of the thermodynamic data and the phase diagrams in these binary systems. Thermodynamic properties of ternary liquid phases are estimated from the binary properties by means of the Conformal Ionic Solution Theory. The ternary phase diagrams are then calculated from these thermodynamic properties by means of computer programs designed for the purpose. It is found that a ternary phase diagram can generally be calculated in this way with a maximum error about twice that of the maximum error in the binary phase diagrams upon which the calculations are based. If, in addition, some reliable ternary phase diagram measurements are available, these can be used to obtain small ternary correction terms. In this way, ternary phase diagram measurements can be smoothed and the isotherms drawn in a thermodynamically correct way. The thermodynamic approach permits experimental data to be critically assessed in the light of thermodynamic principles and accepted solution models. A critical assessment of error limits on all the calculated ternary diagrams is made, and suggestions as to which composition regions merit further experimental study are given.

Densities and Excess Volumes of Fused Halides

1975 ◽  
Vol 30 (1) ◽  
pp. 64-68 ◽  
Author(s):  
H. C. Brookes ◽  
R. L. Paul
Keyword(s):  
Mole Fraction ◽  
Linear Dependence ◽  
Alkali Halide ◽  
Experimental Error ◽  
Van Der Waals ◽  
Excess Volumes ◽  
Van Der Waals Interactions ◽  
Solution Theory ◽  
Conformal Solution Theory ◽  
Volumes Of Mixing

Abstract Densities of molten AgBr-AX (A = Li, Na, K, Rb, Cs; X = Br or Cl), AgBr-AgCl, KBr-NaBr, KBr-CsBr, KCl-KBr, and KCl-CsBr mixtures have been measured at 0.5 mole fraction using the method of Archimedean displacement. The excess volumes of mixing are all positive, except for the AgBr-LiBr system. Attempts to relate the excess volumes of the binary AgBr-ABr systems to the second order conformal solution theory of Reiss, Katz, and Kleppa are unsuccessful, since V E is large even when the diameter difference parameter, δ12, is close to zero. However, the excess volumes of the reciprocal AgBr-ACl systems at 0.5 mole fraction are found, within experimental error, to have a linear dependence on δ12. The positive deviations from conformal solution theory which occur for the alkali halide mixtures have been interpreted in terms of non-Coulombic polarisation and van der Waals interactions.

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