Density and Heat Capacity as a Function of Temperature for Binary Mixtures of 1-Butyl-3-methylpyridinium Tetrafluoroborate + Water, + Ethanol, and + Nitromethane

2007 ◽  
Vol 52 (6) ◽  
pp. 2261-2265 ◽  
Author(s):  
Gonzalo García-Miaja ◽  
Jacobo Troncoso ◽  
Luis Romaní
Keyword(s):  
Heat Capacity ◽  
Binary Mixtures

Molar heat capacity at constant volume. Binary mixtures of 1,2-dicholroethane and 1,2-dibromoethane with cyclohexane

1969 ◽  
Vol 65 ◽  
pp. 1443 ◽  
Author(s):  
E. Wilhelm ◽  
R. Schano ◽  
G. Becker ◽  
G. H. Findenegg ◽  
Friedrich Kohler
Keyword(s):  
Heat Capacity ◽  
Binary Mixtures ◽  
Molar Heat Capacity ◽  
Constant Volume

scholarly journals Thermodynamic Characteristics of Phenacetin in Solid State and Saturated Solutions in Several Neat and Binary Solvents

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4078
Author(s):  
Maciej Przybyłek ◽  
Anna Kowalska ◽  
Natalia Tymorek ◽  
Tomasz Dziaman ◽  
Piotr Cysewski
Keyword(s):  
Heat Capacity ◽  
Solid State ◽  
Binary Mixtures ◽  
Thermodynamic Characteristics ◽  
Precise Determination ◽  
Binary Solvents ◽  
Binary Solvent ◽  
Aqueous Mixtures ◽  
Scanning Calorimetry ◽  
Aqueous Binary Mixtures

The thermodynamic properties of phenacetin in solid state and in saturated conditions in neat and binary solvents were characterized based on differential scanning calorimetry and spectroscopic solubility measurements. The temperature-related heat capacity values measured for both the solid and melt states were provided and used for precise determination of the values for ideal solubility, fusion thermodynamic functions, and activity coefficients in the studied solutions. Factors affecting the accuracy of these values were discussed in terms of various models of specific heat capacity difference for phenacetin in crystal and super-cooled liquid states. It was concluded that different properties have varying sensitivity in relation to the accuracy of heat capacity values. The values of temperature-related excess solubility in aqueous binary mixtures were interpreted using the Jouyban–Acree solubility equation for aqueous binary mixtures of methanol, DMSO, DMF, 1,4-dioxane, and acetonitrile. All binary solvent systems studied exhibited strong positive non-ideal deviations from an algebraic rule of mixing. Additionally, an interesting co-solvency phenomenon was observed with phenacetin solubility in aqueous mixtures with acetonitrile or 1,4-dioxane. The remaining three solvents acted as strong co-solvents.

scholarly journals Thermal Analysis of Binary Mixtures of Imidazolium, Pyridinium, Pyrrolidinium, and Piperidinium Ionic Liquids

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6383
Author(s):  
Elena Gómez ◽  
Pedro Velho ◽  
Ángeles Domínguez ◽  
Eugénia A. Macedo
Keyword(s):  
Thermal Analysis ◽  
Differential Scanning Calorimetry ◽  
Heat Capacity ◽  
Ionic Liquids ◽  
Thermal Behavior ◽  
Binary Mixtures ◽  
Heat Capacities ◽  
Viable Alternative ◽  
Transition Temperatures ◽  
Scanning Calorimetry

Ionic liquids (ILs) are being widely studied due to their unique properties, which make them potential candidates for conventional solvents. To study whether binary mixtures of pure ionic liquids provide a viable alternative to pure ionic liquids for different applications, in this work, the thermal analysis and molar heat capacities of five equimolar binary mixtures of ionic liquids based on imidazolium, pyridinium, pyrrolidinium, and piperidinium cations with dicyanamide, trifluoromethanesulfonate, and bis(trifluoromethylsulfonyl)imide anions have been performed. Furthermore, two pure ionic liquids based on piperidinium cation have been thermally characterized and the heat capacity of one of them has been measured. The determination and evaluation of both the transition temperatures and the molar heat capacities was carried out using differential scanning calorimetry (DSC). It was observed that the thermal behavior of the mixtures was completely different than the thermal behavior of the pure ionic liquids present, while the molar heat capacities of the binary mixtures were very similar to the value of the average of molar heat capacities of the two pure ionic liquids.

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