Heats of Dilution and Relative Heat Contents of Aqueous Solutions of Lanthanum Chloride and Lanthanum Sulfate at 25°

1943 ◽  
Vol 65 (5) ◽  
pp. 790-794 ◽  
Author(s):  
C. C. Nathan ◽  
W. E. Wallace ◽  
A. L. Robinson
Keyword(s):  
Aqueous Solutions ◽  
Lanthanum Chloride ◽  
Heats Of Dilution ◽  
Lanthanum Sulfate

scholarly journals HEATS OF SOLUTION, HEATS OF DILUTION, AND SPECIFIC HEATS OF AQUEOUS SOLUTIONS OF CERTAIN AMINO ACIDS

1935 ◽  
Vol 108 (1) ◽  
pp. 161-185
Author(s):  
Charles A. Zittle ◽  
Carl L.A. Schmidt
Keyword(s):  
Amino Acids ◽  
Aqueous Solutions ◽  
Specific Heats ◽  
Heats Of Solution ◽  
Heats Of Dilution

VAPOR PRESSURES OF AQUEOUS SOLUTIONS OF SILVER NITRATE, OF AMMONIUM NITRATE, AND OF LITHIUM NITRATE

1956 ◽  
Vol 34 (2) ◽  
pp. 151-159 ◽  
Author(s):  
A. N. Campbell ◽  
J. B. Fishman ◽  
G. Rutherford ◽  
T. P. Schaefer ◽  
L. Ross
Keyword(s):  
Aqueous Solutions ◽  
Silver Nitrate ◽  
Direct Determination ◽  
Lithium Ion ◽  
Silver Ions ◽  
Lithium Nitrate ◽  
Vapor Pressures ◽  
Heats Of Dilution ◽  
Water Of Hydration

This paper is devoted to the direct determination of the vapor pressures of solutions of the nitrates of silver, of ammonium, and of lithium, at temperatures varying from 30 °C. to 105 °C. and at concentrations varying from 10 to 85 weight % (for lithium nitrate, the limited solubility precluded measurements beyond 65%). From the vapor pressures, the enthalpies of evaporation of water (by a modification of the Clapeyron–Clausius equation), the differential heats of dilution, and the activities of water (as compared with the mole fractions of the solvent) have been calculated. From the results we conclude that the water of hydration of the ammonium and silver ions (if, indeed, these ions are hydrated at all) is very loosely attached, while that of the lithium ion is strongly bound.

The Heats of Dilution of Aqueous Solutions of Four Amino Acids at 25°

1949 ◽  
Vol 71 (4) ◽  
pp. 1463-1468 ◽  
Author(s):  
L. S. Mason ◽  
W. F. Offutt ◽  
A. L. Robinson
Keyword(s):  
Amino Acids ◽  
Aqueous Solutions ◽  
Heats Of Dilution

Heats of dilution at 25.deg. of aqueous solutions of the bolaform electrolyte [Bu3N(CH2)8NBu3]X2

1969 ◽  
Vol 73 (12) ◽  
pp. 4334-4337 ◽  
Author(s):  
Siegfried Lindenbaum
Keyword(s):  
Aqueous Solutions ◽  
Heats Of Dilution

The Heats of Dilution of Aqueous Solutions of Four Amino Butyric Acids at 25°1

1947 ◽  
Vol 69 (4) ◽  
pp. 889-893 ◽  
Author(s):  
L. S. Mason ◽  
A. L. Robinson
Keyword(s):  
Aqueous Solutions ◽  
Heats Of Dilution

The Activity and Osmotic Coefficients of Aqueous Solutions of Lanthanum Chloride at 25°

1936 ◽  
Vol 58 (10) ◽  
pp. 2032-2033 ◽  
Author(s):  
Charles M. Mason ◽  
Grace L. Ernst
Keyword(s):  
Aqueous Solutions ◽  
Osmotic Coefficients ◽  
Lanthanum Chloride

Chaleur de dilution de solutions aqueuses d'acide polyacrylique, de son sel de sodium et de l'acide propionique

1971 ◽  
Vol 49 (24) ◽  
pp. 3935-3939 ◽  
Author(s):  
Jean-Pierre Cartier ◽  
Hubert Daoust
Keyword(s):  
Aqueous Solutions ◽  
Propionic Acid ◽  
Polyacrylic Acid ◽  
Sodium Polyacrylate ◽  
Heat Of Dilution ◽  
Concentrated Solutions ◽  
Sodium Salts ◽  
Structure Of Water ◽  
Calvet Microcalorimeter ◽  
Heats Of Dilution

With a Tian–Calvet microcalorimeter, heats of dilution at 25 °C have been measured for aqueous and acid (0.2 N HCl) solutions of polyacrylic acid and of propionic acid, and for aqueous solutions of the sodium salts of polyacrylic acid. The results are interpreted in terms of the change in structure of water resulting from the lengthening of the solute molecule. The heat of dilution of moderately concentrated solutions of sodium polyacrylate can be explained by the theory of Eigen and Wicke.

Chaleurs de dilution de solutions aqueuses d'acide polyméthacrylique et de ses sels de sodium et de rubidium

1976 ◽  
Vol 54 (12) ◽  
pp. 1853-1859 ◽  
Author(s):  
Hubert Daoust ◽  
Alain Lajoie
Keyword(s):  
Aqueous Solutions ◽  
Average Molecular Weight ◽  
Solute Concentration ◽  
Isobutyric Acid ◽  
Polymethacrylic Acid ◽  
Heat Of Dilution ◽  
Entire Concentration Range ◽  
Calvet Microcalorimeter ◽  
Heats Of Dilution ◽  
S Model

Heats of dilution of aqueous solutions of two polymethacrylic acid samples having a viscosity average molecular weight of 5000 (PMA-I) and 140 000 (PMA-II) respectively and of isobutyric acid (BA) have been measured at 25 °C using a Tian–Calvet microcalorimeter. The same measurements have been repeated in presence of HCl (0.2 N). Aqueous solutions of sodium and rubidium salts of PMA-I and II have also been investigated. Dilution of BA solutions is endothermic at high solute concentration and then becomes exothermic as concentration decreases and the presence of HCl does not affect the results. Dilution of PMA solutions is exothermic over the investigated concentration range in agreement with the results of Eliassaf and co-workers. PMA-I gives a more exothermic heat of dilution than PMA-II in the lower concentration range. The presence of HCl does not affect appreciably the results for PMA-II but it makes the dilution of PMA-I solutions less exothermic. The results are discussed in the light of Liquori et al.'s model for PMA chain which may adopt a globular or an extended solvated coil depending on solvent properties. Heats of dilution of aqueous solutions of sodium salts of both samples I and II are endothermic over the entire concentration range investigated whereas the heats of dilution of rubidium salts are exothermic.

Sign in / Sign up

Export Citation Format

Share Document