Experimental Study of Some Thermodynamic Properties of Binary Mixtures Containing 3-Amino-1-propanol, 2-Aminoethanol, and 1-Butanol at Temperatures of 293.15–333.15 K to Model the Excess Molar Volumes Using the PFP Theory

The thermodynamic properties of binary liquid mixtures involving ionic liquids (ILs) with alcohols were determined. ILs are an important class of solvents since they are being investigated as environmentally benign solvents, because of their negligible vapour pressure, and as potential replacement solvents for volatile organic compounds (VOCs) currently used in industries. Alcohols were chosen for this study because they have hydrogen bonding and their interaction with ILs will help in understanding the intermolecular interactions. Also, their thermodynamic properties are used for the development of specific chemical processes. The excess molar volumes of binary mixtures of {1-ethyl-3-methylimidazolium ethylsulfate + methanol or 1-propanol or 2-propanol}, {trioctylmethylammonium bis (trifluoromethyl-sulfonyl) imide + methanol or ethanol or 1-propanol}, {1-buty-3-methylimidazolium methylsulfate + methanol or ethanol or 1-propanol} were calculated from experimental density values, at T = (298.15, 303.15 and 313.15) K. The Redlich-Kister smoothing polynomial was fitted to the excess molar volume data. The partial molar volumes of the binary mixtures {1-ethyl-3-methylimidazolium ethylsulfate + methanol or 1-propanol or 2-propanol}, {trioctylmethylammonium bis (trifluoromethyl-sulfonyl) imide + methanol or ethanol or 1-propanol}, {1-buty-3-methylimidazolium methylsulfate + methanol or ethanol or 1-propanol} were calculated from the Redlich-Kister coefficients, at T = (298.15, 303.15 and 313.15) K. This information was used to better understand the intermolecular interactions with each solvent at infinite dilution. iii The isentropic compressibility of {trioctylmethylammonium bis (trifluoromethyl-sulfonyl) imide + methanol or ethanol or 1-propanol}, were calculated from the speed of sound data at T = 298.15 K.

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Thermophysical properties of binary mixtures of N,N-dimethylformamide with three cyclic ethers

Journal of the Serbian Chemical Society ◽

10.2298/jsc121210031s ◽

2013 ◽

Vol 78 (9) ◽

pp. 1443-1460 ◽

Cited By ~ 5

Author(s):

Biswajit Sinha ◽

Rajendra Pradhan ◽

Sanjoy Saha ◽

Dhiraj Brahman ◽

Abhijit Sarkar

Keyword(s):

Ambient Temperature ◽

Binary Mixtures ◽

Atmospheric Pressure ◽

Excess Molar Volumes ◽

Partial Molar Volumes ◽

Excess Properties ◽

Pfp Theory ◽

Liquid Component ◽

Molar Volumes ◽

Excess Partial Molar Volumes

Densities and viscosities of the binary mixtures consisting of tetrahydrofuran (THF), 1,3-dioxolane (1,3-DO) and 1,4-dioxane (1,4-DO) with N,N-dimethylformamide (DMF) over the entire range of composition were measured at temperatures 298.15, 308.15 and 318.15 K and at atmospheric pressure. Ultrasonic speeds of sound of these binary mixtures were measured at ambient temperature and atmospheric pressure (T = 298.15 K and P = 1.01?105 Pa). The various experimental data were utilized to derive excess molar volumes (VmE), excess viscosities (?E), and excess isentropic compressibilities (?sE). Using the excess molar volumes (VmE), excess partial molar volumes (and ) and excess partial molar volumes at infinite dilution (and ) of each liquid component in the mixtures were derived and discussed. Excess molar volumes (VmE) as a function of composition at ambient temperature and atmospheric pressure were used further to test the applicability of the Prigogine-Flory-Patterson (PFP) theory to the experimental binaries. The excess properties were found to be either negative or positive depending on the nature of molecular interactions and structural effects of liquid mixtures. Em,1V Em,2VE0,m,1VE0,m,2V.

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