Aquation of tris(5-nitro-1,10-phenanthroline) iron(II) in binary aqueous mixtures; comparison of kinetic parameters for reaction and thermodynamic properties of the mixtures

1976 ◽  
pp. 385 ◽  
Author(s):  
Michael J. Blandamer ◽  
John Burgess ◽  
Robert I. Haines
Keyword(s):  
Thermodynamic Properties ◽  
Kinetic Parameters ◽  
Aqueous Mixtures

Heat capacities and volumes in aqueous polymer and polymer–surfactant solutions

1987 ◽  
Vol 65 (5) ◽  
pp. 990-995 ◽  
Author(s):  
Gérald Perron ◽  
Josée Francoeur ◽  
Jacques E. Desnoyers ◽  
Jan C. T. Kwak
Keyword(s):  
Thermodynamic Properties ◽  
Chain Length ◽  
Polymer Concentration ◽  
Heat Capacities ◽  
Aqueous Mixtures ◽  
Alkyltrimethylammonium Bromides ◽  
Aqueous Polymer ◽  
Surfactant Interactions ◽  
Polymer Surfactant ◽  
Polymer Interaction

The apparent molar volumes and heat capacities of aqueous mixtures of neutral polymers and ionic surfactants were measured at 25 °C. The polymers chosen were poly(vinylpyrrolidone) (PVP) and poly(ethyleneoxide) (PEO) and the surfactants were the C8, C10, and C12 homologs of sodium alkylsulfates and the C10, C12, and C16 homologs of alkyltrimethylammonium bromides. The polymer–surfactant interactions depend on the nature of both components and on the chain length of the surfactant. The thermodynamic properties of the cationic surfactants are essentially the same in the absence and presence of polymer indicating little surfactant–polymer interaction. On the other hand, the thermodynamic properties of anionic surfactants are shifted, upon the addition of polymers, in the direction of enhanced hydrophobic association. The effect increases with the surfactant chain length and with the polymer concentration. The effect is larger with PVP than with PEO.

Thermodynamic Properties and Kinetic Parameters for Cyclic Ether Formation from Hydroperoxyalkyl Radicals

2003 ◽  
Vol 107 (24) ◽  
pp. 4908-4920 ◽  
Author(s):  
Catherina D. Wijaya ◽  
Raman Sumathi ◽  
William H. Green
Keyword(s):  
Thermodynamic Properties ◽  
Kinetic Parameters ◽  
Cyclic Ether

Thermodynamic properties of aqueous mixtures of LiCl and Li2SO4 at different temperatures

1995 ◽  
Vol 45 (1-2) ◽  
pp. 117-130 ◽  
Author(s):  
Yan Yao ◽  
Ruiling Wang ◽  
Xucun Ma ◽  
Pengsheng Song
Keyword(s):  
Thermodynamic Properties ◽  
Aqueous Mixtures ◽  
Different Temperatures

Polarographic Study of the Electrode Reaction of Zn(II) in Formamide and Dimethylformamide

1975 ◽  
Vol 30 (5-6) ◽  
pp. 350-354 ◽  
Author(s):  
Sudhindra Swarup Sharma ◽  
Mukhtar Singh
Keyword(s):  
Kinetic Parameters ◽  
Organic Solvents ◽  
Metal Ion ◽  
Supporting Electrolyte ◽  
Electrode Reaction ◽  
Polarographic Study ◽  
Aqueous Mixtures ◽  
Diffusion Controlled ◽  
And Diffusion

The reduction of Zn(II) at the d.m.e. has been studied in aqueous mixtures of formamide and dimethylformamide. The general polarographic characteristics have been determined, using 0.1 M NaNO3 as the supporting electrolyte. The reduction of Zn(II) in these organic solvents is irreversible and diffusion controlled. The kinetic parameters, αna and kf,h have been calculated separately by KOTECKY and DELAHAY treatments. The change of polarographic characteristics and kinetic parameters is explained in terms of solvation of the metal ion in these solvents. The electrocapillary curves in the presence of these solvents have also been studied.

scholarly journals Thermodynamic properties of isoprene and monoterpene derived organosulfates estimated with COSMO<i>therm</i>

2019 ◽  
Author(s):  
Noora Hyttinen ◽  
Jonas Elm ◽  
Jussi Malila ◽  
Silvia M. Calderón ◽  
Nønne L. Prisle
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressures ◽  
Aqueous Mixtures ◽  
Ambient Conditions ◽  
Salting Out ◽  
Degree Of Dissociation ◽  
Range Transport ◽  
High Degree ◽  
Saturation Vapor ◽  
Atmospherically Relevant

Abstract. Organosulfates make significant contributions to atmospheric secondary organic aerosol (SOA), but little is still known about the thermodynamic properties of atmospherically relevant organosulfates. We have used the COSMOtherm program to calculate both gas- and condensed-phase properties of previously identified atmospherically relevant monoterpene and isoprene derived organosulfates. Properties include solubilities, activities and saturation vapor pressures, which are critical to the aerosol phase stability and atmospheric impact of organosulfate SOA. Based on the estimated saturation vapor pressures, the organosulfates of this study can all be categorized as semi- or low-volatile, with saturation vapor pressures 4 to 8 orders of magnitude lower than that of sulfuric acid. The estimated pKa values of all the organosulfates indicate a high degree of dissociation in water, leading in turn to high dissociation corrected solubilities. In aqueous mixtures with inorganic sulfate, COSMOtherm predicts a salting out of both the organosulfates and their sodium salts from inorganic co-solutes. The salting-out effect of ammonium sulfate (less acidic) is stronger than of ammonium bisulfate (more acidic). Finally, COSMOtherm predicts liquid-liquid phase separation in systems containing water and monoterpene derived organosulfates. The COSMOtherm estimated properties support the observed stability of organosulfates as SOA constituents and their long range transport in the atmosphere, but also show significant variation between specific compounds and ambient conditions.

scholarly journals Thermodynamic properties of isoprene- and monoterpene-derived organosulfates estimated with COSMO<i>therm</i>

2020 ◽  
Vol 20 (9) ◽  
pp. 5679-5696 ◽  
Author(s):  
Noora Hyttinen ◽  
Jonas Elm ◽  
Jussi Malila ◽  
Silvia M. Calderón ◽  
Nønne L. Prisle
Keyword(s):  
Thermodynamic Properties ◽  
Vapor Pressures ◽  
Aqueous Mixtures ◽  
Ambient Conditions ◽  
Salting Out ◽  
Degree Of Dissociation ◽  
Range Transport ◽  
High Degree ◽  
Saturation Vapor ◽  
Atmospherically Relevant

Abstract. Organosulfates make significant contributions to atmospheric secondary organic aerosol (SOA), but little is known about the thermodynamic properties of atmospherically relevant organosulfates. We have used the COSMOtherm program to calculate both the gas- and condensed-phase properties of previously identified atmospherically relevant monoterpene- and isoprene-derived organosulfates. Properties include solubilities, activities and saturation vapor pressures, which are critical to the aerosol-phase stability and atmospheric impact of organosulfate SOA. Based on the estimated saturation vapor pressures, the organosulfates of this study can all be categorized as semi-volatile or low-volatile, with saturation vapor pressures 4 to 8 orders of magnitude lower than that of sulfuric acid. The estimated pKa values of all the organosulfates indicate a high degree of dissociation in water, leading in turn to high dissociation-corrected solubilities. In aqueous mixtures with inorganic sulfate, COSMOtherm predicts a salting-out of both the organosulfates and their sodium salts from inorganic co-solutes. The salting-out effect of ammonium sulfate (less acidic) is stronger than of ammonium bisulfate (more acidic). Finally, COSMOtherm predicts liquid–liquid-phase separation in systems containing water and monoterpene-derived organosulfates. The COSMOtherm-estimated properties support the observed stability of organosulfates as SOA constituents and their long-range transport in the atmosphere but also show significant variation between specific compounds and ambient conditions.

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