Heat-of-mixing for the partially miscible system N2/C2H6

1988 ◽  
Vol 66 (4) ◽  
pp. 626-627 ◽  
Author(s):  
Jorge C. G. Calado ◽  
Prakash Gopal ◽  
John A. Zollweg ◽  
W. Reid Thompson
Keyword(s):  
Liquid System ◽  
Heat Of Mixing ◽  
Liquid Separation ◽  
Flow Calorimeter ◽  
Heats Of Mixing ◽  
Partially Miscible ◽  
Cryogenic Flow ◽  
Composition Curve

Heats-of-mixing for the liquid system nitrogen/ethane have been measured at 92.3 K and 0.6309 MPa using a cryogenic flow calorimeter. The heat-of-mixing versus composition curve shows that the system is only partially miscible; the compositions between which liquid–liquid separation occurs have been estimated.

scholarly journals Notizen:Mischungsenthalpien beim flüssigen System Wasser + Essigsäure / Heats of Mixing for the Liquid System Water + Acetic Acid

1972 ◽  
Vol 27 (10) ◽  
pp. 1527-1529 ◽  
Author(s):  
R. Haase ◽  
P. Steinmetz ◽  
K.-H. Dücker
Keyword(s):  
Acetic Acid ◽  
Power Series ◽  
Liquid System ◽  
Heat Of Mixing ◽  
Pure Liquid ◽  
Calorimetric Measurements ◽  
Heats Of Mixing ◽  
Free Parameters ◽  
C 30 ◽  
System Water

Calorimetric measurements of the heats of mixing for the liquid system water+acetic acid at 17 °C, 20 °C, 25 °C, 30 °C, 40 °C, and 50 °C show that there is a change of sign in the function H̅E(x), where H̅E denotes the molar heat of mixing and x the mole fraction of acetic acid. The process of mixing the pure liquid components is weakly exothermic for low acid concentrations, but strongly endothermic for high acid concentrations. The function H̅E can be approximately represented by the usual power series with respect to x, five free parameters at each temperature being necessary.

Simultaneous correlation of vapour-liquid equilibrium and heats of mixing and prediction of excess heat capacities. The systems benzene-n-alcohols and cyclohexane-n-alcohols

1979 ◽  
Vol 44 (3) ◽  
pp. 808-822 ◽  
Author(s):  
Vladimír Dohnal ◽  
Jaroslav Vinš ◽  
Robert Holub
Keyword(s):  
Experimental Data ◽  
Binary Systems ◽  
Heat Capacities ◽  
Heat Of Mixing ◽  
Data Sets ◽  
Wilson Equation ◽  
Excess Heat ◽  
Excess Heat Capacities ◽  
Heats Of Mixing ◽  
Quadratic Temperature

The Wilson, the enthalpic Wilson and the Orye equations were used for the simultaneous correlation of extensive data sets on VLE and heats of mixing of eight binary systems hydrocarbon-n-alcohol, viz. benzene-methanol, -ethanol, -n-propanol, -n-butanol, cyclohexane-ethanol, -n-propanol, -n-butanol and n-heptane-ethanol. The expected quadratic temperature dependence of parameters of these equations makes a good simultaneous description possible of excess free enthalpy and heat of mixing as a function of temperature. The Wilson equation gives demonstrably the best description of the experimental data. All the equations were as well used to predict excess heat capacities for the systems listed and the confidence intervals were estimated for the predicted results. The comparison with experimental data for four of these systems shows that the predicted excess heat capacities are in general in good agreement with the experiment; however, the Wilson equation yielded again the best results.

THE EQUILIBRIUM DIAGRAMS, HEATS OF MIXING, DIPOLE MOMENTS, DENSITIES, AND BOILING POINTS OF THE SYSTEM ACETONE–CHLOROFORM–BENZENE

1961 ◽  
Vol 39 (4) ◽  
pp. 735-744 ◽  
Author(s):  
A. N. Campbell ◽  
E. M. Kartzmark ◽  
H. Friesen
Keyword(s):  
Solid State ◽  
Boiling Point ◽  
Binary Systems ◽  
Dipole Moments ◽  
Equilibrium Diagram ◽  
Ternary Mixtures ◽  
Heat Of Mixing ◽  
High Concentration ◽  
Boiling Points ◽  
Heats Of Mixing

The equilibrium diagrams show that a compound, stable in the solid state, is formed in the system chloroform–acetone, but no compound is formed in the binary systems chloroform–benzene and acetone–benzene. The ternary equilibrium diagram, the heats of mixing, and the dipole moments, all show that this compound continues to exist in the presence of benzene, up to a high concentration of benzene. Since a series of ternary mixtures is shown to exist having zero heat of mixing, it was thought that this series of mixtures might behave in a pseudoideal manner, but the determinations of density (molar volume) and boiling point show that this is not so.

The Interaction between Rubber and Liquids. VI. Swelling and Solubility in Mixed Liquids

1945 ◽  
Vol 18 (2) ◽  
pp. 241-255 ◽  
Author(s):  
Geoffrey Gee
Keyword(s):  
Binary Mixtures ◽  
Cohesive Energy ◽  
Ternary Mixture ◽  
Heat Of Mixing ◽  
Research Association ◽  
Linear Polymers ◽  
Heats Of Mixing ◽  
Fundamental Research ◽  
Solvent Properties ◽  
Solvent Power

Abstract The equations derived in the previous paper for the osmotic equilibrium between a ternary mixture of polymer + two liquids and a mixture of the two liquids are applied to the swelling of cross-linked polymers in mixed liquids and to the solubility of linear polymers in mixed liquids. A mixed liquid has solvent properties intermediate between those of its components only when these mix ideally. The larger the heat of mixing of the liquids, the greater is the solvent power of the mixture relative to those of the components. This conclusion forms the basis of an explanation of the enhanced swelling of rubbers in pairs of dissimilar liquids and of the fact that a mixture of two nonsolvents may be a solvent over a certain range of concentration. Experimental results are given for the swelling of vulcanized rubbers and the critical solubility limits of unvulcanized rubbers. It is shown that these can be explained qualitatively from the cohesive energy densities of the three components, and semiquantitatively from the measured heats of mixing of the three binary mixtures. The work described in these two papers forms a part of the program of fundamental research on rubber undertaken by the Board of the British Rubber Producers' Research Association.

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