scholarly journals Excess molar volume of the acetonitrile + alcohol systems at 298.15K. Part I: Density measurements for acetonitrile + methanol, + ethanol systems

2002 ◽  
Vol 67 (8-9) ◽  
pp. 581-586 ◽  
Author(s):  
Ivona Grguric ◽  
Aleksandar Tasic ◽  
Bojan Djordjevic ◽  
Mirjana Kijevcanin ◽  
Slobodan Serbanovic
Keyword(s):  
Molar Volume ◽  
Excess Molar Volume ◽  
Atmospheric Pressure ◽  
Composition Range ◽  
Entire Composition Range ◽  
Density Measurements ◽  
Binary Liquid ◽  
Liquid Systems ◽  
Vibrating Tube Densimeter ◽  
Kister Equation

The excess molar volume VE of the binary liquid systems acetonitrile methanol and acetonitrile + ethanol has been evaluated from density measurements at 298.15K and at atmospheric pressure over the entire composition range. A vibrating tube densimeter, type Anton Paar DMA 55, was applied for these measurements. The Redlich?Kister equation was used to fit the experimental VE data.

scholarly journals Densities and viscosities for binary mixtures of n-heptane with alcohols at different temperatures

2017 ◽  
Vol 82 (7-8) ◽  
pp. 891-903 ◽  
Author(s):  
Maria Budeanu ◽  
Vasile Dumitrescu
Keyword(s):  
Molar Volume ◽  
Excess Molar Volume ◽  
Atmospheric Pressure ◽  
Binary Systems ◽  
Composition Range ◽  
Excess Functions ◽  
Experimental Measurements ◽  
Different Temperatures ◽  
The One ◽  
Kister Equation

Densities (?) and viscosities (?) of the binary systems n-heptane with alcohols (ethanol, propan-1-ol and propan-2-ol) were measured at temperatures between 288.15 and 308.15 K and at atmospheric pressure, over the whole composition range. The excess values of molar volume (VE) and viscosity (?E) were calculated from experimental measurements. The excess functions of the binary systems were fitted to Redlich?Kister Equation. Comparison between experimental excess molar volume and the one calculated from Flory and Prigogine?Flory?Patterson theories, has also been done. The viscosity results were fitted to the equations of Grunberg?Nissan, Heric?Brewer, Jouyban?Acree and McAllister. Also, the activation energies of viscous flow have been obtained and their variations with compositions have been discussed.

scholarly journals Thermo Physical Properties for Binary Mixture of Dimethylsulfoxide and Isopropylbenzene at Various Temperatures

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Maninder Kumar ◽  
V. K. Rattan
Keyword(s):  
Refractive Index ◽  
Binary Mixture ◽  
Speed Of Sound ◽  
Excess Molar Volume ◽  
Atmospheric Pressure ◽  
Composition Range ◽  
Isentropic Compressibility ◽  
Experimental Measurements ◽  
Kister Equation ◽  
Thermo Physical Properties

Density, refractive index, speed of sound, and viscosity have been measured of binary mixture dimethylsulfoxide (DMSO) + isopropylbenzene (CUMENE) over the whole composition range at 298.15, 303.15, 308.15, and 313.15 K and atmospheric pressure. From these experimental measurements the excess molar volume, deviations in viscosity, molar refractivity, speed of sound, and isentropic compressibility have been calculated. These deviations have been correlated by a polynomial Redlich-Kister equation to derive the coefficients and standard error. The viscosities have furthermore been correlated with two or three parameter models, that is, herric correlation and McAllister model, respectively.

Ultrasonic Speeds and Volumetric Properties of Dipropylene Glycol Monomethyl Ether–n-Alkylamine Mixtures at 298.15 K

2002 ◽  
Vol 216 (9) ◽  
Author(s):  
A. Pal ◽  
R. K. Bhardwaj
Keyword(s):  
Molar Volume ◽  
Excess Molar Volume ◽  
Atmospheric Pressure ◽  
Composition Range ◽  
Excess Molar Volumes ◽  
Monomethyl Ether ◽  
Volumetric Properties ◽  
Ultrasonic Speed ◽  
Glycol Monomethyl Ether ◽  
Dipropylene Glycol

The excess molar volume and ultrasonic speed have been measured in dipropylene glycol monomethyl ether + butylamine, dibutylamine, and tributylamine across the entire composition range, at the temperature 298.15 K and atmospheric pressure. The ultrasonic speed values have been combined with those of the excess molar volumes converted to densities to give estimates of the product

scholarly journals Excess molar volume of acetonitrile + alcohol systems at 298. 15 K. - Part II: Correlation by cubic equation of state

2003 ◽  
Vol 68 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Ivona Grguric ◽  
Mirjana Kijevcanin ◽  
Bojan Djordjevic ◽  
Aleksandar Tasic ◽  
Slobodan Serbanovic
Keyword(s):  
Equation Of State ◽  
Molar Volume ◽  
Excess Molar Volume ◽  
Interaction Parameters ◽  
Mixing Rules ◽  
Cubic Equation Of State ◽  
Binary Liquid ◽  
Cubic Equation ◽  
Previous Part ◽  
Liquid Systems

The excess molar volume VE of the binary liquid systems acetonitrile methanol and acetonitrile + ethanol, experimentally determined in the previous part, were correlated by the PRSV CEOS coupled with the vdW and TCBT mixing rules. The results obtained show that the number and position of the interaction parameters of these models are of great importance for a satisfactory fitting of VE data.

Mixing Enthalpies of TbBr3-MBr Liquid Mixtures

2001 ◽  
Vol 56 (12) ◽  
pp. 859-864 ◽  
Author(s):  
L. Rycerz ◽  
M. Gaune-Escard
Keyword(s):  
Mole Fraction ◽  
Composition Range ◽  
Liquid Mixtures ◽  
Entire Composition Range ◽  
Mixing Enthalpy ◽  
Rich Region ◽  
Enthalpies Of Mixing ◽  
Binary Liquid ◽  
Liquid Systems ◽  
Mixing Enthalpies

AbstractThe molar enthalpies of mixing, Δmix Hm in the binary liquid systems TbBr3-MBr (M = Li, Na, K, Rb, Cs) have been m easured with a Calvet-type high-tem perature microcalorimeter over the entire composition range with an accuracy of about 6 %. Mixing of the two liquid components was achieved by using the “break-off am poule” technique. All the investigated systems show negative enthalpies of mixing with a minim um value of approxim ately -1.25, - 8 .3 , -17.0, - 2 0 . 0 and -22.5 kJ mol -1, for M = Li, Na, K, Rb and Cs, respectively. The mixing enthalpy in the TbBr3- LiBr system is positive in the TbBr3-rich region. For all the systems, the enthalpy minimum occurs at mole fraction xTbBr3 ≈ 0.3 - 0.4. The molar enthalpies of form ation Δ formHm (3MBr, TbBr3, 1) for M = Li, Na, K, Rb and Cs at 1113 K (arising from the reaction 3M Br(1) +TbBr3(1) = (3MBr, TbBr3) (1)) are found to be -4 .8 , -31.3, -63.3, -70.3 and -8 1 .2 kJ mol-1 , respectively. The leastsquares coefficients A, B, C, D and E in the equation λ (kJ mol-1) = A + B x + C x2 + Dx3 + Ex4, where A is an interaction param eter and x = xTbBr , are also reported.

Molar excess volumes of binary liquid mixtures: 2-pyrrolidinone with C6–C10n-alkanols

1996 ◽  
Vol 74 (1) ◽  
pp. 121-127 ◽  
Author(s):  
Begoña García ◽  
Francisco J. Hoyuelos ◽  
Rafael Alcalde ◽  
José M. Leal
Keyword(s):  
Steric Effect ◽  
Composition Range ◽  
Liquid Mixtures ◽  
Excess Volumes ◽  
Density Measurements ◽  
Binary Liquid ◽  
Thermal Expansion Coefficients ◽  
Maximum Value ◽  
Expansion Coefficients ◽  
Molar Excess Volumes

The excess volumes VE of the binary mixtures 2-pyrrolidinone–(C6–C10) n-alkanols have been calculated from density measurements over the whole composition range and the 298.15–318.15 K temperature range. The excess volumes were independent of temperature, but changed noticeably with the chain length of the alkanol. The VE values were only positive starting from heptanol, with the maximum value, 0.239 cm3 mol−1, for equimolar decanol. The observed changeover VE < 0 to VE > 0 suggests that the steric effect is primarily responsible for the positive contributions to VE. The thermal expansion coefficients α were evaluated from the variation of densities with temperature. Key words: excess volumes, 2-pyrrolidinone, n-alkanols, liquid mixtures, hydrogen bonding.

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