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excess molar volume and Apparent molar volume of Binary Mixtures of 2-Methyl-3-buten-2-ol with 1-Alcohol at 298.15K

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Chinese Journal of Chemical Engineering 2002年第4期10卷 454-458页

作者：刘迪霞李浩然邓东顺韩世钧 Department of Chemistry Zhejiang University Hangzhou 310027

excess molar volumes (V^E_m) of binary mixtures of2-methyl-3-buten-3-ol [CH_3C(OH)(CH_3)CHCG_2] with four 1-alcohols:methanol, ethanol, 1-propanol and l-butanol at 298.15 K andatmospheric pressure are derived from density measurements with avibrating-tube densimeter. All the excess volumes are negative in thesystems over the entire composition range. The results are correlatedwith the Redlich-Kister equation. The effects of chain length ofl-alcohols on V^E_m are discussed. The apparent molar volumes of2-methyl-3-ol and l-alcohols are calculated respectively.

关键词： excess molar volume binary mixture 2-methyl-3-buten-2-ol l-alcohol

excess molar volume, Viscosity and Heat Capacity for the Mixture of 1,2-Propanediol-Water at Different Temperatures

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Chinese Journal of Chemical Engineering 2003年第2期11卷 175-180页

作者：杨长生马沛生唐多强靳凤民 State Key Lab of C1 Chemistry and Technology School of Chemical Engineering and TechnologyTianjin University

Experimental densities, viscosities and heat capacities at different temperatures were presented over the entire mole fraction range for the binary mixture of 1,2-propanediol and water. Density values were used in the determination of excess molar volumes, VE. At the same time, the excess viscosity was investigated. The values of VE and E were fitted to the Redlich-Kister equation. Good agreement was observed. The excess volumes are negative over the entire range of composition. They show an U-shaped-concentration dependence and decrease in absolute values with increase of temperature. Values of E are negative over the entire range of the composition, and has a trend very similar to that of VE . The analysis shows that at any temperature the specific heat of mixture is a linear function of the composition as x1 > 20%. All the extended lines intersect at one point. An empirical equation is obtained to calculate the specific heat to mixture at any composition and temperature in the experimental range.

关键词： viscosity heat capacity density excess molar volume molecular interaction

excess molar volume, Viscosity and Heat Capacity for the Binary Mixture of p-Xylene and Acetic Acid at Different Temperatures

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Chinese Journal of Chemical Engineering 2002年第5期10卷 604-609页

作者：杨长生马沛生唐多强尹秋响赵长伟 School of Chemical Engineering and Technology Tianjin University State Key of C_1 Chemistry and Technology 天津 300072

Experimental densities, viscosities and heat capacities atdifferent temperatures were presented over the entire range of molefraction for the binary mixture of p-xylene and acetic acid. Densityvalues were used in the determination of excess molar volumes, V^*** the same time, the excess viscosity and excess molar heatcapacities were calculated. The values of V^E, η~E and c^E_p werefitted to the Redlich-Kister equation. Good agreements were *** excess molar volumes are positive with a large maximum valuelocated in the central concentration range.

关键词： viscosity heat capacity density excess molar volume

Studies on Lattice Parameter,molar volume and excess molar volume of Pb-based a-phase Solid Solution in Pb-Sn-Cd Ternary System

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Chemical Research in Chinese Universities 1990年第4期6卷 300-306页

作者： Liu Hengli (Department of Rock Chemistry, Changchun University of Earth Science, Changchun)Long Xiang, Kang Hongye and Zhao Muyu (Department of Chemistry, Jilin University, Changchun)

The lattice parameters a and the molar volumes Km of Pb-based a-phase solid solutions in the Pb-Sn-Cd ternary system were determined by means of X-ray diffraction. The lattice parameters a vary linearly with the molar fractions, the molar volumes show a positive deviation from the ideal solution behaviour, and the contribution of the solute Cd to the excess molar volumes V is much larger than that of the solute Sn. According to Vegard' s law orsub-regular solution model, the relationship between the experimental data of a or Vm andthe compositions of alloy is obtained by the mathematic regressive method, the prediction precisions of the both formulae are within the limits of experiment error.

关键词： Alloy solid solution Lattice parameter molar volume excess molar volume

Density and excess molar volume of Binary Mixtures ofp-Xylene＋Acetic Acid and o-Xylene＋Acetic Acid at Different Temperatures and Pressures

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Chinese Journal of Chemical Engineering 2008年第2期16卷 247-255页

作者：杨天宇夏淑倩邸志国马沛生 School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A new apparatus was designed with a thick-walled glass capillary, electric heater tube with red copper and heat preservation. The thick-walled glass capillary was used for its advantages of resistance to acid corrosion and pressure, and ease of observation. The experimental densities over the entire range of mole fraction for the binary mixture of p-xylene＋acetic acid and o-xylene＋acetic acid were measured using the new apparatus at temperatures ranging from 313.15K to 473.15K and pressure ranging from 0.20 to 2,0 MPa. The density values were used in the determination of excess molar volumes, W. The Redlich-Kister equation was used to fit the excess molar volume values, and the coefficients and estimate ot the standard error values were presented. The experimental resuits prove that the density measurement apparatus is successful.

关键词： density excess molar volume p-xylene o-xylene acetic acid

excess molar volumes and Viscosities of Binary Mixture of Diethyl Carbonate+Ethanol at Different Temperatures

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Transactions of Tianjin University 2005年第2期11卷 101-105页

作者：马沛生李楠楠 Key Laboratory for Green Chemical Technology of Education Ministry of China School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

The purpose of this work was to report excess molar volumes and dynamic viscosities of the binary mixture of diethyl carbonate （DEC）+ethanol. Densities and viscosities of the binary mixture of DEC+ethanol at temperatures 293.15 K—343.15 K and atmospheric pressure were determined over the entire composition range. Densities of the binary mixture of DEC+ethanol were measured by using a vibrating U-shaped sample tube densimeter. Viscosities were determined by using Ubbelohde suspended-level viscometer. Densities are accurate to 1.0×10-5 g·cm-3, and viscosities are reproducible within ±0.003 mPa·s. From these data, excess molar volumes and deviations in viscosity were calculated. Positive excess molar volumes and negative deviations in viscosity for DEC+ethanol system are due to the strong specific *** excess molar vo-（lumes） and deviations in viscosity fit to the Redlich-Kister polynomial *** fitting parameters were presented,and the average deviations and standard deviations were also *** errors of correlation are very *** proves that it is valuable for estimating densities and viscosities of the binary mixture by the correlated equation.

关键词： density viscosity excess molar volume diethyl carbonate ethanol

Density, Viscosity, and excess Properties for Binary Mixture of Diethylene Glycol Monoethyl Ether ＋ Water from 293.15 to 333.15 K at Atmospheric Pressure

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Chinese Journal of Chemical Engineering 2009年第6期17卷 1009-1013页

作者：李新学徐国民王彦伟胡一江 Department of Chemistry University of Science and Technology Beijing Beijing 100083 China No 4 Oil Production Company Petrochina Daqing Oilfield Daqing 163511 China

Densities and viscosities were measured as a function of composition for binary liquid mixture of diethylerie glycol monoethyl ether [CH3CH2O（CH2）2O（CH2）2OH] ＋ water from 293.15 to 333.15 K at atmospheric pressure, with a capillary pycnometer and Ubbelohde capillary viscometer respectively. From the experimental data, the excess molar volume V^E, viscosity deviation △η, and the excess energy of activation for viscous flow △G^＊E were calculated. These data were correlated by the Redlich-Kister type equations to obtain the coefficients and standard deviations. The results showed a strong molecular interaction between diethylene glycol monoethyl ether and water.

关键词： density viscosity diethylene glycol monoethyl ether binary mixture excess molar volume viscosity deviation

Density and surface tension of binary mixtures of 1-ethyl-3-methylimdazolium nitrate with alcohols

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Chinese Chemical Letters 2012年第11期23卷 1295-1298页

作者： Feng Yun Zhao Li Ya Liang Jian Ying Wang Yong Qi Hu College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018China

New experimental data of densities and surface tensions are presented for the binary mixtures of the ionic liquid 1-ethyl-3- methyl imidazolium nitrate （[EMIM]NO3） with methanol and ethanol. Measurements were performed at 298.15 K and atmospheric pressure, covering the whole composition range. excess molar volumes VE and the surface tension deviations 8y have been determined. For the excess molar volumes of binary mixture, there is a region of negative VE at low IL mole fraction, passing through a minimum and then VE increases and becomes positive, showing maximum at higher IL mole fraction. It is shown that the surface tension deviations ~y of [EMIM]NO3 ＋ methanol system are positive but those of [EMIM]NO3 ＋ ethanol system are negative over the entire mole fraction range.

关键词： Ionic liquid Density Surface tension excess molar volume

Densities of methanol+trimethyl phosphate binary mixtures from (293.15 to 333.15)K and viscosities of trimethyl phosphate from (283.15 to 373.15)K

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Journal of Beijing Institute of Technology 2011年第2期20卷 267-271页

作者：王利生田娜娜范传雷 School of Chemical Engineering and Environment Beijing Institute of Technology

Densities of methanol＋trimethyl phosphate binary mixtures were measured over a temperature range of （293.15 to 333.15）K at atmospheric pressure. From these data, excess molar volume（VE） was calculated. Viscosities of trimethyl phosphate were also measured over a temperature range of （283.15 to 373.15）K and the data were fitted to the Andrade equation. The density data were fitted to a second-order polynomial. The excess molar volumes were fitted to the Redlich-Kister equation using a nonlinear regression method. Results show that the density and viscosity gradually decreases with the increase of temperature.

关键词： trimethyl phosphate density viscosity excess molar volume