The effect of temperature and pressure on acoustic and thermodynamic properties of 1,4-butanediol. The comparison with 1,2-, and 1,3-butanediols

Zorębski, Edward; Dzida, Marzena

doi:10.1016/j.jct.2012.03.013

Cited by 46 publications

(45 citation statements)

References 43 publications

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“…The present work complements previous reports about the effect of pressure and temperature on acoustic and thermodynamic properties of selected alkanediols by means of the acoustic method [5][6][7][8]. The present study is aimed at the effects of pressure p and temperature T on the second-order derivatives of the free energy functions in order to provide data for a better knowledge about the behavior of hydrogen-bonded liquids under elevated pressures.…”

Section: E Zorębski (B)mentioning

confidence: 57%

The Effect of Pressure and Temperature on the Second-Order Derivatives of the Free Energy Functions for Lower Alkanediols

Zorębski

2014

Int J Thermophys

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The second-order derivatives of the free energy functions, i.e., isochoric molar heat capacities, isentropic and isothermal molar compressibility, and isobaric and isentropic molar thermal expansion, were calculated in the temperature range from (293.15 to 318.15) K and at pressures up to 100 MPa for 1,2-and 1,3-propanediol; 1,2-, 1,3, and 1,4-butanediol; and 2-methyl-2,4-pentanediol. The data for calculations were obtained by means of the acoustic method. The pressure and temperature dependencies for the above mentioned properties are analyzed and discussed together with the literature data on isobaric molar heat capacities. The observed marked difference between isobaric and isentropic thermal expansion is analyzed as well. The differences in behavior of linear 1,2-diols and α, ω-diols as well as a diol with a branched carbon chain are emphasized. The isentropic and isothermal molar compressibilities are used to evaluate the dimensionality and relative rigidity of H-associates.

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Section: E Zorębski (B)mentioning

confidence: 57%

The Effect of Pressure and Temperature on the Second-Order Derivatives of the Free Energy Functions for Lower Alkanediols

Zorębski

2014

Int J Thermophys

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“…[6][7][8] Unfortunately, this crucial condition can sometimes be overlooked. In other words, it should be keep in mind that for all aprotic RTILs studied to date, the determined f rel decrease with the decreasing temperature 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 30 and increasing side alkyl chain length in 3-methylimidazolium cation, 1 3,58 In other words, the lower the temperature, the higher the increase of the speed of sound with the decreasing temperature (concave up curve) is observed, and it is typical behavior in dispersion regions.…”

Section: Acs Paragon Plus Environmentmentioning

confidence: 99%

“…5 Ultrasound absorption investigations are also very useful and informative in the case of the pressure-temperature measurements of the speed of sound (an indirect route to obtain all of the observable thermodynamic properties of a fluid phase) as they must be carried out outside of the relaxation regions. [6][7][8] Furthermore, knowledge of ultrasound absorption is necessary in some methods used for the study of the nonlinear acoustic properties of the liquids. 9 Unfortunately, there is a lack of ultrasound absorption in ILs data available in the literature.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Relaxation Study of 1-Alkyl-3-methylimidazolium-Based Room-Temperature Ionic Liquids: Probing the Role of Alkyl Chain Length in the Cation

et al. 2016

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Ultrasound absorption spectra of four 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide were determined as a function of the alkyl chain length on the cation from 1-propyl-to 1-hexyl-from 293.15 to 323.15 K at ambient pressure. Herein, the ultrasound absorption measurements were carried out using a standard pulse technique within a frequency range from 10 to 300 MHz. Additionally the speed of sound, density and viscosity have been measured. The presence of strong dissipative processes during the ultrasound wave propagation was found experimentally, i.e. relaxation processes in the megahertz range were observed for all compounds over the whole temperature range. The relaxation spectra (both relaxation amplitude and relaxation frequency) were shown to be dependent on the alkyl side chain length of the 1-alkyl-3-methylimidazolium ring. In most cases, a single Debye model described the absorption spectra very well. However, a comparison of the determined spectra with the spectra of a few other imidazolium-based ionic liquids reported in the literature (in part recalculated in this work) shows that the complexity of the spectra increases rapidly with the elongation of the alkyl chain length on the cation.This complexity indicates that both the volume viscosity and the shear viscosity are involved in relaxation processes even in relatively low frequency ranges. As a consequence, the sound velocity dispersion is present at relatively low megahertz frequencies.

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“…2). The cell was calibrated by measuring Ds in water, toluene and 2-butanediol at atmospheric pressure, over the full range of temperatures T = (298.15-343.15) K and u = (1117-1602) m s À1 using a total of 22 (T, u) data points for these liquids (water [24], toluene [25], and 2-butanediol [26]). The literature u(T) data were fitted using the following equation:…”

Section: Sound Speed Measurementmentioning

confidence: 99%

Speed of sound in pure fatty acid methyl esters and biodiesel fuels

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Talavera-Prieto

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et al. 2014

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The effect of temperature and pressure on acoustic and thermodynamic properties of 1,4-butanediol. The comparison with 1,2-, and 1,3-butanediols

Cited by 46 publications

References 43 publications

The Effect of Pressure and Temperature on the Second-Order Derivatives of the Free Energy Functions for Lower Alkanediols

The Effect of Pressure and Temperature on the Second-Order Derivatives of the Free Energy Functions for Lower Alkanediols

Ultrasonic Relaxation Study of 1-Alkyl-3-methylimidazolium-Based Room-Temperature Ionic Liquids: Probing the Role of Alkyl Chain Length in the Cation

Speed of sound in pure fatty acid methyl esters and biodiesel fuels

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