Heats of solution of 1?1 electrolytes in 1-propanol, and derived enthalpies of transfer from water

1977 ◽  
Vol 6 (8) ◽  
pp. 491-500 ◽  
Author(s):  
Michael H. Abraham ◽  
Angela F. Danil de Namor ◽  
Ronald A. Schulz
Keyword(s):  
Enthalpies Of Transfer ◽  
Heats Of Solution

Protonation of purines and related compounds in dimethylsulfoxide and water

1985 ◽  
Vol 63 (6) ◽  
pp. 1228-1232 ◽  
Author(s):  
Robert L. Benoit ◽  
Danielle Boulet ◽  
Luc Séguin ◽  
Monique Fréchette
Keyword(s):  
Solvent Effect ◽  
Functional Groups ◽  
Thermodynamic Data ◽  
Ionization Constants ◽  
Enthalpies Of Transfer ◽  
Heats Of Solution ◽  
Bonding Properties ◽  
Related Compounds

The ionization constants of the conjugated acids BH+ of purine, adenine, 9-methyladenine, adenosine, guanine, and hypoxanthine, and of the related compounds imidazole, N-methylimidazole, benzimidazole, and 4-amino-2,6-dimethylpyrimidine have been determined potentiometrically in Me2SO. The heats of solution and the heats of protonation of most of these bases have been obtained by calorimetry. Some additional determinations were carried out in water so that thermodynamic data in Me2SO and in water could be compared. Our discussion of the solvent effect on these data is largely based on a consideration of the enthalpies of transfer of B and BH+ and emphasizes the contrasting H-bonding properties of the solvents and of the functional groups on the solutes B and BH+.

Heats of solution of electrolytes in ethanol and derived enthalpies of transfer from water

1978 ◽  
Vol 74 (0) ◽  
pp. 359 ◽  
Author(s):  
Michael H. Abraham ◽  
Eric Ah-Sing ◽  
Angela F. Danil de Namor ◽  
Tony Hill ◽  
Asadollah Nasehzadeh ◽  
...  
Keyword(s):  
Enthalpies Of Transfer ◽  
Heats Of Solution

Enthalpies of transfer of alkane solutes from the vapor state to organic solvents

1985 ◽  
Vol 63 (2) ◽  
pp. 349-352 ◽  
Author(s):  
Richard Fuchs ◽  
W. Kirk Stephenson
Keyword(s):  
Organic Solvents ◽  
Solubility Parameter ◽  
Empirical Correlation ◽  
Enthalpies Of Transfer ◽  
Vapor State ◽  
Heats Of Solution ◽  
Hildebrand Solubility Parameter

Heats of solution of 5 – 8 C5–C16 alkane liquids have been determined in each of 19 organic solvents covering the Taft–Kamlert π* (dipolarity-polarizability) range −0.08 to 1.00. Enthalpies of alkane transfer from vapor to solvents have been calculated (ΔH(v → S) = ΔHs − ΔHv). The methylene increments in (ΔH(v → S) in the 19 solvents and water (−1.18 to −0.67 kcal/mol) are not well correlated with the Hildebrand solubility parameter δ, but an empirical correlation exists with solvent π* and polarizability:[Formula: see text](n = 20, r = 0.977, see = 0.032). By this criterion the small methylene increment in water appears to be associated with the high dipolarity and low polarizability of water.

Heats of Solution of Some Sodium and Potassium Salts in Water and in Water-Methanol Mixtures

1992 ◽  
Vol 57 (11) ◽  
pp. 2227-2234 ◽  
Author(s):  
Ján Benko ◽  
Oľga Vollárová
Keyword(s):  
Transfer Functions ◽  
Enthalpies Of Solution ◽  
Potassium Salts ◽  
Solvent Interactions ◽  
Heats Of Solution ◽  
Solvent Molecules ◽  
Sodium And Potassium

The enthalpies of solution ∆Hs0 were determined for NaSCN, KSCN, NaBrO3, KBrO3, NaClO3, KClO3, NaIO4, KMnO4, KNO2 and NaNO2 in water-methanol mixtures. The transfer functions ∆Ht0 of the salts and anions were calculated based on the extrathermodynamic TPTB assumption. The ∆Ht0 values of the anion obtained from the sodium and potassium salts were compared. The differences observed, particularly at higher concentrations of the cosolvent, are discussed with respect to the interactions between the solvent molecules and the solute-solvent interactions.

The Molar Heats of Solution of Boric Oxide and Boric Acid1

1951 ◽  
Vol 73 (2) ◽  
pp. 579-581 ◽  
Author(s):  
Ervin R. Van Artsdalen ◽  
Keith P. Anderson
Keyword(s):  
Boric Oxide ◽  
Heats Of Solution

Calorimetrie an Yttriumtrihalogeniden und Yttriumoxidhalogemden / Calorimetry of Yttrium Trihalides and Yttrium Oxyhalides

1997 ◽  
Vol 52 (3) ◽  
pp. 305-310 ◽  
Author(s):  
H. Oppermann ◽  
S. Ehrlich ◽  
C. Hennig
Keyword(s):  
Enthalpies Of Formation ◽  
Heats Of Solution

Abstract The heats of solution of Yttrium, YOCL, YOBr, YOI, YCl3, YBr3, YI3 and Y2O3 were determined in 4n HX. From those the enthalpies of formation of Yttrium Trihalides YX3 and Yttrium Oxyhalides YOX at 298 K were derived: ΔHB0(YCl3,f,298) = -240.4 ± 0.6 kcal/mol, ΔHB0(YBr3,f,298) = -202.1 ± 1.5 kcal/mol,ΔHB0(YI3,f ,298) = -147.0 ± 1.7 kcal/mol, ΔHB0(YOClf,298) = -240.2 ± 1.0 kcal/mol, ΔHB0(YOBrf,298) = -229.7 ± 2.0 kcal/mol, ΔHB0(YOIf ,298) = -208.8 ± 2.0 kcal/mol.

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