Effect of Temperature on Thermophysical Properties of Ethanol + Aliphatic Alcohols (C4–C5) Mixtures (original) (raw)
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ACS Omega, 2021
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Thermochimica Acta, 2005
The ternary systems 1,1-dimethylethoxy-butane (BTBE) + methanol + water and BTBE + ethanol + water have large heterogeneous zones. Experimental densities, refractive indices and speeds of sound have been measured at 298.15 K for mixtures of these systems within the homogeneous zone, and also for methanol + BTBE and ethanol + BTBE binary systems over the entire range of compositions. Excess molar volumes and molar refraction and isentropic compressibility changes of mixing were calculated from the experimental physical properties and were satisfactorily correlated with the corresponding composition data using the Redlich-Kister polynomial. Fitted coefficients and mean standard deviations of correlations have been reported.
A Review on Thermodynamics of Mixtures-Studies and Investigations
https://www.ijrrjournal.com/IJRR\_Vol.4\_Issue.6\_June2017/Abstract\_IJRR004.html, 2017
The non-ideal liquid and gas mixtures need to be studied for extent of non-ideality. The measurements of excess properties can be carried out experimentally by utilizing various measurable properties. Also these can be estimated by various model equations. Density, excess molar volume and apparent molar volume for a binary mixture are major properties. Thermodynamics can be used as a tool to determine many volumetric properties like this. Factors such as temperature, pressure affect the thermodynamic and volumetric properties considerably. These are large number of properties of a mixture such as thermal expansion coefficients, excess thermal expansion coefficients, and isothermal coefficients of pressure excess molar enthalpy, partial molar volumes, partial molar volumes at infinite dilution, partial excess molar volumes, and partial excess molar volumes at infinite dilution which have thermodynamic significance. Current review summarizes research and studies on thermodynamics of mixtures
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Journal of Thermal Analysis and Calorimetry, 2007
Knowledge of thermodynamic properties and phase equilibria of ethanol, water and the different flavour components in distillated alcoholic beverages is of practical interest to the food industry since industrial procedures applied are close related on their temperature and pressure dependence in order to obtain a quality final product. Thermodynamics studies provide the additional advantage of an interesting trend of analysis of microscale interaction for understanding macroscale behaviour of gases and liquids on mixing. In accordance to that, a considerable effort has been developed in the field of thermodynamic properties although a great scarce of data is observed in open literature for mixtures enclosed into commercial alcoholic beverages, this fact is described in [1]. Experimental Materials All chemical solvents used in the preparation of samples were of Panreac quality with richness better than 99.5 mol%. The pure components were stored in sun light protected form and constant humidity and temperature. In order to reduce fraction molar errors, the vapour space into the vessels was minimized during samples preparation. Mixtures were prepared by mass using a Salter ER-182A balance, the whole composition range of the ternary mixture being covered. The accuracy in molar fractions was obtained as higher than ±5⋅10-4. Methods The ultrasonic velocities were measured with an Anton Paar DSA-48 device with a precision of ±1 m s-1. Calibration of the apparatus was performed periodically, in accordance with technical specifications, using Millipore quality water (resistivity, 18.2 MΩ cm) and ambient air. Maximum deviation in the calculation of changes of isentropic compressibility for these mixtures have been estimated better than 1 TPa-1. The values of the pure components, as well as, open literature data are enclosed into Table 1. More details about techniques and procedure in our
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Thermochimica Acta, 1996
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A Case Study on Excess Thermodynamic properties and Molecular Interactions in Binary liquid Mixture
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Transport properties, physico-chemical and thermodynamic of fluids are significant for perception of physical phenomena and thermodynamic features and are also required in industrial computations, analytical science, pharmaceutical formulation processes and for scheming and improving manufacturing operations. The majority of such fluid systems manifest non-linear mixtures' behaviour. Consequently rigorous data must be available with semi-empirical equations which are able to furnish a reliable estimation for some physico-chemical quantities of binary liquid systems. The current investigation extends a linking formula supplying a consistent evaluation of physico-chemical features of binary systems of fluids against of mole composition. The validity of the suggested formula has been estimated using well-known binary component solutions and the investigational data of the considered quantities, have been compared with extended equation versus Belda one.
International journal of applied thermodynamics, 2022
Experimental densities, viscosities, refractive indices, and sound speeds at temperature 298.15 K and atmospheric pressure are reported for the binary liquid mixtures of ethanol + benzene, ethanol + pyridine, and benzene + pyridine. From these experimental data, various thermodynamic excess and deviation properties were calculated and fitted by the Redlich-Kister polynomial to determine the adjustable coefficients and the standard deviations. The number of Redlich-Kister coefficients for significantly representing each thermodynamic property was optimized by applying the F-test. The variation of thermodynamic excess and deviation properties with composition has been interpreted in terms of molecular interactions between components of the mixture and structural effects. Furthermore, several theoretical and semi-empirical models were used to predict the refractive indices and sound speeds of the investigated mixtures. The predicting ability of each model was ascertained in terms of mean absolute percentage deviation between experimental and calculated data.
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