𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Apparent molar volumes of aqueous solutions of some organic solutes at the pressure 28 MPa and temperatures to 598 K

✍ Scribed by Cecil M. Criss; Robert H. Wood

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
514 KB
Volume
28
Category
Article
ISSN
0021-9614

No coin nor oath required. For personal study only.

✦ Synopsis

Densities of aqueous solutions of 16 organic electrolytes and polar solutes containing different functional groups at molality m10.12 mol•kg -1 have been measured at temperatures T= (298.15, 373.15, 448.15, and 523.15) K and at pressure p=28 MPa. Densities of three of the solutions were also determined at T=598.15 K. Partial molar volumes at infinite dilution V a 2 and p=28 MPa were calculated for each of the solutes at the various temperatures and the results used to evaluate group contributions to V a 2 of the functional groups: CH3-, -CH2-, -CONH2, -COOH, -OH, and -NH2. The V a 2 s for most of the nonelectrolytes appear to be diverging in a positive direction at the higher temperatures, while V a 2 for the electrolytes diverges in a negative direction. Temperature dependencies of V a 2 for the solutes were analyzed in terms of four different semi-empirical equations employing temperature and temperature-dependent properties of water as variables. Parameters for each solute for the four equations are tabulated along with the standard deviations of the fits. All four equations reproduce the results reasonably well within the range of the measurements, but diverge widely above the temperature limits of the measurements. Two of the four equations have been fitted to the group volumes. These equations, along with the group additivity principle, were used to reproduce V a 2 of the original electrolytes over the entire range of temperatures, showing that the group additivity principle is useful to at least T=523 K. This suggests that these equations may be used to give reasonable estimates of V a 2 from T=298.15 K to T=523 K for any aqueous organic solute which can be constructed from the six functional groups for which V a 2 s now exist.

📜 SIMILAR VOLUMES

Apparent molar volumes and apparent mola
Apparent molar volumes and apparent molar heat capacities of aqueous solutions ofα- andβ-cyclodextrins at temperatures from 278.15 K to 393.15 K and at the pressure 0.35 MPa
✍ M.L Origlia-Luster; T.G Call; E.M Woolley 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 609 KB

Apparent molar heat capacities C p,φ and apparent molar volumes V φ were determined for aqueous solutions of αand β-cyclodextrins at temperatures from 278.15 K to 393.15 K and at the pressure 0.35 MPa. The molalities investigated ranged from 0.008 mol • kg -1 to 0.12 mol • kg -1 for α-cyclodextrin a

Apparent molar volumes and apparent mola
Apparent molar volumes and apparent molar heat capacities of aqueous solutions ofN,N- dimethylformamide andN,N- dimethylacetamide at temperatures from 278.15 to 393.15 K and at the pressure 0.35 MPa
✍ M.L. Origlia; ; B.A. Patterson; ; E.M. Woolley 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 651 KB

Apparent molar heat capacities C p,φ and apparent molar volumes V φ were determined for aqueous solutions of N ,N -dimethylformamide and N ,N -dimethylacetamide at temperatures from 278.15 to 393.15 K and at the pressure 0.35 MPa. The molalities investigated ranged from 0.015 mol•kg -1 to 1.0 mol •

Volumes and heat capacities of aqueous s
Volumes and heat capacities of aqueous solutions of hydrochloric acid at temperatures from 298.15 K to 623 K and pressures to 28 MPa
✍ Andrei V. Sharygin; Robert H. Wood 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 410 KB

Densities of aqueous solutions of HCl at molalities from 0.1 mol•kg -1 to 6.0 mol•kg -1 , temperatures from 298.15 K to 623 K, and pressures of 10 MPa and 28 MPa have been measured with a vibrating-tube flow densimeter. Heat capacities of the above solutions at temperatures from 302 K to 623 K and a

Apparent molar heat capacitites of aqueo
Apparent molar heat capacitites of aqueous solutions of CH4, CO2, H2S, and NH3at temperatures from 304 K to 704 K at a pressure of 28 MPa
✍ Lubomı́r Hnědkovský; Robert H. Wood 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 258 KB

Heat capacities of dilute aqueous solutions of methane, carbon dioxide, hydrogen sulfide and ammonia were measured at temperatures ranging from 300 K to 705 K and at pressure 28 MPa. The thermodynamic behaviour of aqueous non-electrolytes in the supercritical region is discussed. The results show th

Volumes and heat capacities of aqueous s
Volumes and heat capacities of aqueous solutions of ammonium chloride from the temperatures 298.15 K to 623 K and pressures to 28 MPa
✍ Andrei V. Sharygin; Robert H. Wood 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 516 KB

Densities of aqueous solutions of NH4Cl at molalities ranging from 0.1 mol•kg -1 to 6.0 mol•kg -1 , temperatures from 298.15 K to 623 K, and pressures of 10 MPa and 28 MPa were measured using a vibrating tube flow densitometer. Heat capacities of the above solutions at temperatures from 302 K to 623

Densities of aqueous solutions of sodium
Densities of aqueous solutions of sodium carbonate and sodium bicarbonate at temperatures from (298 to 623) K and pressures to 28 MPa
✍ Andrei V. Sharygin; Robert H. Wood 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 237 KB

y1 Densities of aqueous solutions of Na CO and NaHCO with molalities from 0.1 mol kg 2 3 3 . y 1 to 1.0 mol kg have been measured from the temperatures 298 K to 623 K and pressures up Ž . to 28 MPa using a vibrating-tube flow densimeter. The volumetric results for Na CO aq 2 3 Ž . and NaHCO aq are