Evaluation of excess isentropic compressibilities and isochoric heat capacities

Benson, George C.; Kiyohara, Osamu

doi:10.1016/0021-9614(79)90136-8

Cited by 591 publications

(196 citation statements)

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“…Considering the relationship between the isothermal and adiabatic compressibility coefficients, it has been shown (20)(21)(22)(23)(24) that the adiabatic compressibility coefficient of an ideal mixture can be expessed as where pi, Vi, a,, and C,,, are the adiabatic compressibility coefficient, molar volume, coefficient of thermal expansion, and heat capacity at constant pressure, respectively, of the pure i components and T is the absolute temperature. The excess adiabatic compressibility coefficients are defined as 151 ~p = preal -pideal which represents the excess of the given property of a real mixture over the value for an ideal mixture at the same temperature, pressure, and composition.…”

Section: °Cmentioning

confidence: 99%

“…However, closer examination of the physical nature of compressibilities suggests that, 'while many thermodynamic and physical properties of ideal solutions are represented by the mole fraction weighted averages of component properties, it is more appropriate to use volume fraction weighted averages of compressibility coefficients of pure solution components to estimate ideal behavior of this property (20)(21)(22)(23)(24). Large differences occur between the values of excess compressibility coefficients estimated by these two methods, especially when the molar volumes of the individual component differ considerably.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonic velocity, excess adiabatic compressibility, apparent molar volume, and apparent molar compressibility properties of binary liquid mixtures containing 2-butoxyethanol

Rao¹,

Verrall²

1987

Can. J. Chem.

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. Can. J. Chem. 65, 810 (1987). Ultrasonic velocity and density data of binary systems of water-2-butoxyethanol (BE), 2-butoxyethanol-benzene, and 2-butoxyethanol-decane are reported for temperatures of 25, 40, and 55°C. Adiabatic compressibility coefficients, apparent molar volumes, and apparent molar compressibilities were calculated from these data. Excess adiabatic compressibility properties were evaluated using volume fraction weighting of the individual component properties to estimate ideal mixture behavior. These results are compared with the data obtained based on the use of mole fraction weighting of the individual component properties for the ideal behavior value. A sharp ultrasonic velocity maximum and compressibility minimum is observed at low BE concentration in mixtures of water-BE at all temperatures. These maxima in ultrasonic velocity and minima in adiabatic compressibility are attributed to the formation of "clathrate-like" structures of water and alcohol. A shift of the velocity maximum towards lower concentrations of BE was observed with increase of temperature. A minimum in the ultrasonic velocity and a maximum in adiabatic compressibility coefficient values are observed in systems of BE-benzene and BE-decane. These results are discussed in terms of the breakdown of associated alcohol structures and the interstitial location of hydrocarbon molecules in alcohol aggregates. N. P. RAO et RONALD E. VERRALL. Can. J. Chem. 65, 810 (1987). OpCrant des tempkratures de 25, 40 et 55"C, on a mesurC les vitesses ultrasoniques et les densitCs des systemes binaires eau/butoxy-2 tthanol (BE), butoxy-2 Cthanollbenzkne et butoxy-2 CthanolldCcane. A partir de ces donnCes, on a calculC les coefficients de compressibilitC adiabatique, les volumes molaires apparents et les compressibilitCs molaires apparentes. Utilisant les poids relatifs des fractions du volume des propriCtCs des composantes individuelles pour Cvaluer le comportement du mClange idCal, on a CvaluC les propriCtCs de compressibilitC adiabatique en exces. On compare ces rCsultats avec les donnCes obtenues en se basant sur I'usage des poids relatifs des fractions molaires des propriCtCs des composantes individuelles pour Cvaluer le comportement du mClange ideal. A toutes les temperatures, on observe un maximum important de la vitesse ultrasonique et une compressibilitC minimale a des faibles concentrations de BE dans les mClanges eau/BE. On attribue ces maxima dans la vitesse ultrasonique et ces minima dans la compressibilitC adiabatique a la fom~ation de structures de l'eau et de llCthanol "ressernblant a des chlathrates". Lorsqu'on augmente la tempCrature, on observe un dCplacement du maximum de la vitesse vers les concentrations plus basses de BE. Dans les systemes BEIbenzkne et BEldCcane, on observe un minimum dans la vitesse ultrasonique et un maximum dans les valeurs des coefficients de compressibilitC adiabatique. On discute de ces rCsultats en fonction d'un bris des structures associCes de l'alcool et de la position des molCcules interstiti...

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Section: °Cmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrasonic velocity, excess adiabatic compressibility, apparent molar volume, and apparent molar compressibility properties of binary liquid mixtures containing 2-butoxyethanol

Rao¹,

Verrall²

1987

Can. J. Chem.

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“…The method used for calculating κ s E (Benson -Kiyohara approach) was outlined previously [34]. V E , κ s E and ∆ values were fitted to a Redlich -Kister [35] polynomial equation,…”

Section: Resultsmentioning

confidence: 99%

Electron Releasing Effect on the Thermodynamic and Transport Properties of Liquid Mixtures at Various Temperatures

Raghavendra¹,

Venkatesulu²,

Rao³

et al. 2017

IOSR JAC

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“…In this paper we report measurements of densities, speeds of sound and viscosities for three binary systems, 2-methylaniline + o-chlorotoluene, 2-methylaniline + m-chlorotoluene and 2-methylaniline + p-chlorotoluene at T = (303. 15 over whole composition range;V°m,1 andV°m,2;K°s,m,1 andK°s,m,2;V°Em,1 andV°Em,2 andK°Es,m,1 andK°Es,m,2 of the components in the mixture at infinite dilution, have been calculated. The variations of these properties with composition of the binary mixtures are discussed in terms of molecular interactions between components and structural effects.…”

Section: Study Of Intermolecular Interactions In Binary Mixtures Of 2mentioning

confidence: 99%

Study of Intermolecular Interactions in Binary Mixtures of 2-Methylaniline with Isomeric Chlorotoluenes at Various Temperatures

Raghavendra¹,

Venkatesulu²,

Gowrisankar³

et al. 2017

Asian J. Chem.

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Analyses of each of the three contributions namely, interactional, free volume and P* to V E show that P* contribution is negative for all systems expect p-chlorotoluene, which has positive P* contribution and interactional contribution is positive for all systems. Further, the free volume effect is negative for all the mixtures. The variations of these parameters with composition and temperature are discussed in terms of intermolecular interactions prevailing in these mixtures.

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Evaluation of excess isentropic compressibilities and isochoric heat capacities

Cited by 591 publications

References 10 publications

Ultrasonic velocity, excess adiabatic compressibility, apparent molar volume, and apparent molar compressibility properties of binary liquid mixtures containing 2-butoxyethanol

Ultrasonic velocity, excess adiabatic compressibility, apparent molar volume, and apparent molar compressibility properties of binary liquid mixtures containing 2-butoxyethanol

Electron Releasing Effect on the Thermodynamic and Transport Properties of Liquid Mixtures at Various Temperatures

Study of Intermolecular Interactions in Binary Mixtures of 2-Methylaniline with Isomeric Chlorotoluenes at Various Temperatures

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