Volumetric and refractive index properties of isobutyric acid — water binary mixtures at temperatures ranging from 300.15 to 313.15 K

Toumi, A.; Bouanz, M.

doi:10.1016/j.molliq.2007.11.005

Cited by 36 publications

(19 citation statements)

References 32 publications

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“…The refractive indices have been measured using an Anton Paar GmbH Abbe automatic refract meter with an accuracy of ±5 9 10 -6 units, the temperature of the samples being controlled within ±10 -2 K. The experimental results of calibration for Anton Paar analyzer and refract meter have been checked by comparing their densities, speeds of sound, and refractive indices for water with values available in literature ( Table 1). The experimental data of thermophysical properties of pure water were in good agreement with those from the literature [27][28][29][30][31][32][33][34][35][36][37]. Uncertainties associated with the experimental values of the thermophysical properties are presented in Tables 1 and 2.…”

Section: Apparatus and Measurements Proceduressupporting

confidence: 81%

Thermophysical investigations of exfoliated graphite nanoplatelets and active carbon in binary aqueous environments at different temperatures

2014

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Thermophysical investigations in binary liquid mixtures are important for many technological and environmental applications of exfoliated graphite nanostructures. The densities, speeds of sound, and refractive indices for the binary liquid mixture environments of water ? exfoliated graphite nanoplatelets, and water ? activated carbon have been measured versus composition, at different temperatures, at atmospheric pressure. The thermophysical properties such as the acoustic impedance, isentropic compressibility, specific refraction, space-filling factor, and relaxation strength have been evaluated over the composition range up to 100 kg m -3 , based on the experimental data. The absolute average percentage deviations of the calculated thermophysical properties in both systems were computed. The obtained results are discussed and interpreted in terms of molecular interactions and structural changes of these carbon-based nanomaterials.

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Section: Apparatus and Measurements Proceduressupporting

confidence: 81%

Thermophysical investigations of exfoliated graphite nanoplatelets and active carbon in binary aqueous environments at different temperatures

2014

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“…To examine the suitability of the proposed correlation equation, 26 published systems in literature have been utilized [5,[21][22][23][24][25][26][27]] to investigate the density, viscosity and molar volume (Table-1) and 33 systems for refractive index (Table-2) of diverse dual liquids systems at 1 atmosphere with dissimilar temperature values. The results of these samples magnitudes have been compared with those achieved by the suggested formula, whereas Belda mathematical form arranging as comparing factor for the standard deviation σ assigned as: [27] whereas N is the amount of outcome points of the sample and k is the amount of free adjustable factors of the proper equations 6 and 8 (N = k+1).…”

Section: Resultsmentioning

confidence: 99%

An Extended Belda Equation for Physico-chemical Properties Correlation in Binary Liquid Mixtures at Different Temperatures

Messaâdi¹,

Alkhaldi²,

Alzamel³

et al. 2017

Asian J. Chem.

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INTRODUCTIONPhysico-chemical features of fluid systems are essential for recognizing different thermodynamic behaviours. Diverse physico-chemical characteristics such as density, molar volume, viscosity, surface tension and refractive index should be considered for optimizing and designing fluids [1,2].Some published articles concerning the physico-chemical quantities of fluid show that the majority of them display nonideal behaviour or not arranged in a straight line. Accordingly, the estimations of the above quantities or their variations necessitate empirical or semi-empirical formulae able to give a consistent estimation of their specific features [3][4][5].The present research suggests an extension of Belda equation [5][6][7] giving dependable assessment of the special physicochemical or thermodynamic quantities (density, viscosity, molar volume, surface tension and refractive index, etc.) of dual combinations of fluids against of mole composition. The judgment of the investigational data of those quantities versus Belda model and our proposed extension has been carried out.Correlation equations: For most cases mixing operations in applied chemistry and in industrial engineering is difficult due to the non-straight line performance. Then, accurate statistics have to be obtainable with forms able to furnishing a consistent judgment of physical and chemical properties for different behaviours of liquid mixtures. In general, the theoretical description of concepts related to properties is therefore quite complex and exact explicit expressions are absent. This is the reason why several models have been suggested, extended and/ or modified over the years referred on some theories, or empirical and semi-empirical equations which are constantly unrelated to every kind of binary liquid mixtures. Moreover, investigations on the physico-chemical quantities of dual mixtures show that a large amount of them reveal non-ideal or non-linear behaviours. Consequently, the search of these quantities or their excess or variations necessitates mathematical expressions eligible of giving a valid approximation of their behaviours [1][2][3][4][5][6][7][8]. An Extended Belda Equation for Physico-chemical Properties Correlation in Binary Liquid Mixtures at Different TemperaturesIn the present work, different properties (Y) were correlated with molar composition using the Belda [5] correlation equation and our proposed extension which uses a correcting factor to the linearity. The equation has been applied at least to 26 binary liquid mixtures. The validity versus the magnitude and accuracy of the adjustable parameters is compared and discussed for each property.

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“…http://dx.doi.org/10.1016/j.jct.2012.07.019 are given in table 1. The purity of the solvents were checked by comparing the measured density, speed of sound and refractive index value at various temperature with those reported in literature [5,24,26,[29][30][31][32][33][34][35].The literature and experimental density, speed of sound and refractive index value of pure solvents are given in table 2. The maximum difference between the literature and the experimental density, speed of sound and the refractive index is 0.0005 g Á cm À3 , 3.6 m Á s À1 and 0.0024.…”

Section: Methodsmentioning

confidence: 99%

“…Carboxylic acids are used in many industrial applications for example as: raw material in the manufacture of synthetic odours and flavours, biodegradable plastics, and soaps; coagulants in the manufacture of rubber [1][2][3][4][5][6]. The two most important medicinal carboxylic acid derivatives are 2-(acetyloxy)-benzoic acid (aspirin) and 2-(4-isobutylphenyl) propanoic acid (ibuprofen) [7].…”

Section: Introductionmentioning

confidence: 99%

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Density, speed of sound, and refractive index measurements for the binary systems (butanoic acid+propanoic acid, or 2-methyl-propanoic acid) at T=(293.15 to 313.15)K

Bahadur

Deenadayalu

Naidoo

et al. 2013

The Journal of Chemical Thermodynamics

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Volumetric and refractive index properties of isobutyric acid — water binary mixtures at temperatures ranging from 300.15 to 313.15 K

Cited by 36 publications

References 32 publications

Thermophysical investigations of exfoliated graphite nanoplatelets and active carbon in binary aqueous environments at different temperatures

Thermophysical investigations of exfoliated graphite nanoplatelets and active carbon in binary aqueous environments at different temperatures

An Extended Belda Equation for Physico-chemical Properties Correlation in Binary Liquid Mixtures at Different Temperatures

Density, speed of sound, and refractive index measurements for the binary systems (butanoic acid+propanoic acid, or 2-methyl-propanoic acid) at T=(293.15 to 313.15)K

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