Excess heat capacities of mixtures containing 1-ethyl-3-methylimidazolium tetrafluoroborate, lactams and cyclic alkanones

Sharma, V.K.; Kataria, Jyoti; Sharma, Dimple

doi:10.1007/s10973-015-4412-8

Cited by 13 publications

(4 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After a series of measurements were made of the sample mixtures, density and sound 2. Tao-Smith 55 , χ 3 23 ), where…”

Section: Methodsmentioning

confidence: 99%

“…A review of the literature revealed that thermodynamic properties of ternary mixtures containing the IL [EMIM][BF 4 ] with various organic solvents have been explored at varying temperatures by a number of researchers. − There have been no data published on the thermodynamic properties of the currently explored ternary mixtures. As a result, the originality of the current study is emphasized.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Measurements, Correlation, and Prediction Models to Study 1-Ethyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid Ternary Mixtures

Masilo,

Singh,

Bahadur

et al. 2024

J. Chem. Eng. Data

View full text Add to dashboard Cite

Volumetric and acoustic properties were obtained using density, ρ 123 , and speed of sound, u 123 , experimental values for ternary systems of {[EMIM][BF 4 ] (x 1 ) + acetic acid (x 2 ) + acetophenone (x 3 )} (mix 1 ) and {[EMIM][BF 4 ] (x 1 ) + propionic acid (x 2 ) + acetophenone (x 3 )} (mix 2 ) at T = (293.15−333.15) K and 0.1 MPa. The observed V m123 Eand Δk s123 data of the studied ternary mixtures were modeled with a total of 63 evaluated models, which resulted from a sum of each of nine predictive terms (no estimated parameters) with each of seven correlative terms (estimated parameters). The entire model is a correlative model, and if all of the parameters of the correlative term are set to zero, it becomes a predictive model. The ideal number of parameters in the correlation was then approximated using standard deviations (σ). For mix 1 , V m123 E was only negative and Δk s123 was only positive, while for mix 2 both negative and positive results were found for each property. Also, quantitative results point out that mix 1 is closer to ideal behavior than mix 2 . The modeling for mix 2 employed more complex equations, with more parameters, and even so presented worse deviations than for mix 1 . These results evidence the effect of one CH 2 in the acid chain on the thermodynamic properties of these mixtures.

show abstract

“…After a series of measurements were made of the sample mixtures, density and sound 2. Tao-Smith 55 , χ 3 23 ), where…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Measurements, Correlation, and Prediction Models to Study 1-Ethyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid Ternary Mixtures

Masilo,

Singh,

Bahadur

et al. 2024

J. Chem. Eng. Data

View full text Add to dashboard Cite

show abstract

“…33 The standard uncertainty in temperature measurement is 0.01 K. The measured densities ρ, speeds of sound u, and heat capacities C P , of purified liquids at studied temperatures are listed in Table 2 and also compared with the literature values. [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]56 The excess molar enthalpies, H E , heat capacities, C P of (1 + 2) mixtures and molar heat capacities of pure liquids were measured as a function of composition in a microdifferential scanning calorimeter [model-μ DSC 7 EVO] that has been described elsewhere. 50,51 The calorimeter uses a double-temperature control peltiercooler and works between 228.15 to 393.15 K. A constant sweeping of nitrogen gas for about 4 h (0.3−0.4 MPa pressure) was supplied to avoid steam condensation in the calorimetric walls, and 0.08 MPa pressure of nitrogen gas was maintained after this period.…”

Section: Methodsmentioning

confidence: 99%

“…The working frequency for density and sound analyzer is 3 MHz . The standard uncertainty in temperature measurement is 0.01 K. The measured densities ρ, speeds of sound u , and heat capacities C P , of purified liquids at studied temperatures are listed in Table and also compared with the literature values. − , …”

Section: Methodsmentioning

confidence: 99%

Thermodynamic Studies of Molecular Interactions in Mixtures Containing Tetrahydropyran, 1,4-Dioxane, and Cyclic Ketones

2017

View full text Add to dashboard Cite

The densities ρ, speeds of sound u, and molar heat capacities C P of tetrahydropyran or 1,4-dioxane (1) + cyclohexanone or cycloheptanone (2) mixtures at 293.15, 298.15, 303.15, and 308.15 K, and excess molar enthalpies, H E at 308.15 K and atmospheric pressure 0.1 MPa have been measured over the entire composition range. The excess molar volumes V E, excess isentropic compressibilities κS E, and excess heat capacities, C P E of the studied mixtures have been determined using the measured experimental data. The observed V E, κS E, H E, and C P E data have been tested in terms of graph theory. The analyses of V E data by graph theory suggest that while tetrahydropyran or 1,4-dioxane exists as a mixture of monomer and dimer; cyclohexanone or cycloheptanone exists as a mixture of open and cyclic dimer. Further, (1 + 2) mixtures are characterized by interactions between oxygen atom/s and hydrogen atom of tetrahydropyran or 1,4-dioxane with hydrogen atom/s and oxygen atom of cyclohexanone or cycloheptanone. The quantum mechanical calculations and analysis of IR spectral data of (1 + 2) mixtures also support this viewpoint. It has been observed that graph theory correctly predicts the V E, κS E, H E, and C p E data of the present mixtures.

show abstract

Excess Molar Enthalpies for Binary and Ternary Mixtures Containing Cyclic Ethers, Lactam and Cyclic Ketones

et al. 2017

View full text Add to dashboard Cite

Excess heat capacities of mixtures containing 1-ethyl-3-methylimidazolium tetrafluoroborate, lactams and cyclic alkanones

Cited by 13 publications

References 66 publications

Experimental Measurements, Correlation, and Prediction Models to Study 1-Ethyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid Ternary Mixtures

Experimental Measurements, Correlation, and Prediction Models to Study 1-Ethyl-3-methylimidazolium Tetrafluoroborate Ionic Liquid Ternary Mixtures

Thermodynamic Studies of Molecular Interactions in Mixtures Containing Tetrahydropyran, 1,4-Dioxane, and Cyclic Ketones

Excess Molar Enthalpies for Binary and Ternary Mixtures Containing Cyclic Ethers, Lactam and Cyclic Ketones

Contact Info

Product

Resources

About