Volumes of mixing 2,4-dimethylpyridine withn-alkanes

1996 ◽  
Vol 25 (10) ◽  
pp. 1019-1028 ◽  
Author(s):  
Teresa Kasprzycka-Guttman ◽  
Hanna Wilczura ◽  
Elzbieta Megiel
Keyword(s):  
Volumes Of Mixing

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.

Infrared spectra of synthetic almandine–grossular and almandine–pyrope garnet solid solutions: evidence for equivalent site behaviour

1989 ◽  
Vol 53 (370) ◽  
pp. 231-237 ◽  
Author(s):  
C. A. Geiger ◽  
B. Winkler ◽  
K. Langer
Keyword(s):  
Ir Spectra ◽  
Solid Solutions ◽  
Small Volume ◽  
Frequency Shifts ◽  
Short Range Ordering ◽  
Equivalent Site ◽  
Dodecahedral Site ◽  
Volume Of Mixing ◽  
Volumes Of Mixing ◽  
Long Range Ordering

AbstractThe infrared (IR) spectra of almandine-grossular and almandine-pyrope garnet solid solutions have been measured using the powder method. Frequency shifts of a band related to internal vibrations associated with the 8-co-ordinate dodecahedral site are nonlinear in almandine-grossular garnets and mimic the form of its molar volume of mixing curve. Almandine-pyrope solid solutions have nearly ideal molar volumes of mixing and the frequency shift of this same 8-co-ordinate site-related band is linear. The IR data support the empirically based crystal chemical model of Equivalent Site (ES) behaviour (Newton and Wood, 1980). The IR spectra give no indication of long-range ordering between Ca and Fe2+ in garnet, but thermodynamic calculations involving Ca-poor garnets might be affected by small volume or short-range ordering anomalies.

Volumes of mixing of n-octylacetate + n-alkanes: an interpretation in terms of the Prigogine-Flory-Patterson theory

1988 ◽  
Vol 41 (3) ◽  
pp. 277-285 ◽  
Author(s):  
Akl M. Awwad ◽  
Kifah A. Jbara ◽  
Amar H. Al-Dujaili
Keyword(s):  
Volumes Of Mixing

Excess Heats and Volumes of Mixing

1954 ◽  
Vol 22 (5) ◽  
pp. 955-956 ◽  
Author(s):  
P. Meares
Keyword(s):  
Volumes Of Mixing

Salting-in and salting-out of polar nonelectrolytes

1969 ◽  
Vol 47 (24) ◽  
pp. 4639-4643 ◽  
Author(s):  
J. E. Desnoyers ◽  
F. M. Ichhaporia
Keyword(s):  
Benzoic Acid ◽  
Aqueous Solutions ◽  
Salting Out ◽  
Apparent Molal Volumes ◽  
Volumes Of Mixing ◽  
Molal Volumes

The solubility of toluene and benzaldehyde was measured in NaBr and (n-Pr)4NBr aqueous solutions at 25 °C, and the solubility of benzoic acid and nitrobenzene was measured in the same systems at 10, 25, and 40 °C. The apparent molal volumes of the four nonelectrolytes were also determined from the densities of the saturated aqueous solutions.The volumes of mixing of the nonelectrolytes in water are all negative but become less so as their polarity increases. With the exception of benzoic acid, the salting-out by NaBr and the salting-in by (n-Pr)4NBr both decrease with increasing polarity of the nonelectrolytes. Both salting effects increase with temperature. These trends can be explained with existing theories of salting-out and salting-in.

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