E. Matteoli

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Thermodynamic study of heptane+amine mixtures. V. Excess and solvation Gibbs energies

L. Lepori, E. Matteoli, P. Gianni, M.C. Righetti

Fluid Phase Equilibria > 2015 > 387 > Complete > 198-208

Vapor–liquid equilibria of binary mixtures of n-heptane with 15 amines, primary n-alkyl (C3–C8), secondary (diethyl to dibutyl), branched (iso-propyl and sec-butyl) and cyclic amines (piperidine, hexamethyleneimine, heptamethyleneimine and cyclopentylamine) have been determined by head-space gas chromatographic analysis of the vapor phase directly withdrawn from an equilibration apparatus. Excess...

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Volumetric investigation of the ternary system ethanol+dimethylformamide+cyclohexane at 298.15K

P. Gianni, L. Lepori, E. Matteoli, M.C. Righetti

Fluid Phase Equilibria > 2014 > 368 > Complete > 112-119

Density measurements have been carried out by means of a vibrating tube densimeter for the ternary system ethanol (EtOH)+dimethylformamide (DMF)+cyclohexane (CyH) and for the binary mixture DMF+CyH. Molar excess volumes V ^E at 298.15K, as well as excess apparent molar volumes ΦV,iE of the components, have been obtained from the measured quantities. A large miscibility gap is exhibited by DMF+CyH...

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Excess Gibbs energies and volumes of the ternary system ethanol+dimethylformamide+tetrahydrofuran at 298.15K

P. Gianni, L. Lepori, E. Matteoli, M.C. Righetti

Fluid Phase Equilibria > 2013 > 356 > Complete > 157-167

Density measurements have been carried out by means of a vibrating tube densimeter for the ternary system ethanol (EtOH)+dimethylformamide (DMF)+tetrahydrofuran (THF) and for the binary mixtures containing DMF. For the same ternary system and for the binary DMF+THF vapour–liquid equilibrium data have been collected by head-space gas-chromatographic analysis of the vapour phase directly withdrawn from...

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Calorimetric investigation of the complex formation reaction of 18-crown-6 ether with d,l-alanine in water–ethanol mixtures

T. R. Usacheva, V. A. Sharnin, I. V. Chernov, E. Matteoli

Journal of Thermal Analysis and Calorimetry > 2013 > 112 > 2 > 983-989

The standard thermodynamic parameters (Δ_r G°, Δ_r H°, and TΔ_r S°) of the reaction of molecular complex formation of 18-crown-6 ether (18C6) with d,l-alanine (Ala), [Ala18C6], have been obtained from calorimetric titration experiments carried out using the microcalorimetric system TAM III (TA Instruments, USA) at T = 298.15 K in water–ethanol (H₂O–EtOH) solvents at X _EtOH = 0 ÷ 0.6 mol fractions. Results...

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Molecular complex formation between l-phenylalanine and 18-crown-6 in H₂O–DMSO solvents studied by titration calorimetry at T = 298.15 K

T. R. Usacheva, I. V. Chernov, V. A. Sharnin, S. I. Voronina, more

Journal of Thermal Analysis and Calorimetry > 2013 > 112 > 1 > 399-405

The standard thermodynamic parameters (Δ_r G°, Δ_r H°, TΔ_r S°) of the reaction of molecular complex formation between 18-crown-6 ether (18C6) and l-phenylalanine (Phe), [Phe18C6], have been obtained from calorimetric titration experiments carried out by means of the microcalorimetric system TAM III (TA Instruments, USA) at T = 298.15 K in water–dimethylsulfoxide (H₂O–DMSO) solvents. Results show that...

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The influence of water–ethanol mixture on the thermodynamics of complex formation between 18-crown-6 ether and l-phenylalanine

T.R. Usacheva, V.A. Sharnin, I.V. Chernov, E. Matteoli, more

Chemical Physics Letters > 2012 > 543 > Complete > 155-158

The influence of water–ethanol mixture composition on the complex formation between 18-crown-6 ether and l-phenylalanine was studied by titration calorimetry at Т=298.15K. The standard thermodynamic parameters (Δ _r G ^о , Δ _r H ^о , ТΔ _r S ^о ) of formation of [Phe18C6] molecular complex were calculated from data obtained by means of the microcalorimetric...

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Excess enthalpies of mixtures of mono-carboxylic acid with dibutylether

B. Marongiu, Silvia Porcedda, D. Falconieri, Alessandra Piras, more

Journal of Thermal Analysis and Calorimetry > 2012 > 108 > 2 > 777-782

In this article are reported the excess enthalpies, H ^E, at 298.15 K, of liquid mixtures containing a linear mono-carboxylic acid (1) + di-n-butylether (2), determined by means of a titration calorimetric method. The experimental results, together with the literature data on thermodynamic properties of the above mentioned class of mixtures, have been interpreted in terms of the DISQUAC group contribution...

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Excess Gibbs energies and volumes of the ternary system chloroform+tetrahydrofuran+cyclohexane at 298.15K

P. Gianni, L. Lepori, E. Matteoli

Fluid Phase Equilibria > 2010 > 297 > 1 > 52-61

Vapour–liquid equilibria and densities for the ternary system chloroform+tetrahydrofuran+cyclohexane and for the binary mixtures containing chloroform have been determined at 298.15K. Vapour–liquid equilibrium data have been collected by head-space gas-chromatographic analysis of the vapour phase directly withdrawn from an equilibration apparatus. Density measurements have been carried out by means...

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Thermodynamics of complex formation in mixed solvents K and ΔH for the formation reaction of [Gly18C6] at 298.15 K

E. Matteoli, L. Lepori, T. R. Usacheva, V. A. Sharnin

Journal of Thermal Analysis and Calorimetry > 2009 > 97 > 3 > 811-816

The influence of H₂O–EtOH and H₂O–Acetone mixed solvents at various compositions on the thermodynamics of complex formation reaction between crown ether 18-crown-6 (18C6) and glycine (Gly) was studied. The standard thermodynamic parameters of the complex [Gly18C6] (log K°, Δ_r H°, Δ_r S°) were calculated from thermochemical data at 298.15 K obtained by titration calorimetry. The complex stability and...

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A comparative study of thermodynamic properties of binary mixtures containing perfluoroalkanes

Celia Duce, Maria Rosaria Tinè, L. Lepori, E. Matteoli, more

Journal of Thermal Analysis and Calorimetry > 2008 > 92 > 1 > 145-154

Literature data on molar excess enthalpies and molar excess Gibbs energies, liquid-liquid equilibria, activity coefficients at infinite dilution and partial molar enthalpies at infinite dilution of binary mixtures of n-perfluoroalkanes (C₅−C₈)+n-alkanes (C₅−C₈) and of n-perfluorohexane-linear monoethers of general formula, CH₃(CH₂)_m-O-(CH₂)_n-CH₃ (m,n=1–4), are treated in the framework of DISQUAC,...

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Promoting calorimetry for olive oil authentication

C. Ferrari, M. Angiuli, E. Tombari, M.C. Righetti, more

Thermochimica Acta > 2007 > 459 > 1-2 > 58-63

The aim of this paper is to promote calorimetry for olive oil authentication. It is our belief that the melting and freezing curves by DSC of olive oil and other edible oils could be correlated with quality, origin and storage history of the oil in a simple way, suitable for oil industry and market. Nucleation, crystallization kinetics and transition enthalpies of oil are indeed strongly dependent...

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I. Excess and solvation enthalpies

B. Marongiu, E. Pusceddu, S. Porcedda, L. Lepori, more

Fluid Phase Equilibria > 2006 > 250 > 1-2 > 105-115

The excess enthalpies, H ^E , at 298.15K for binary mixtures of 1,1,2,2-tetrachloroethane (TCE)+an hydrocarbon (n-heptane, cyclohexane, benzene, toluene, ethyl-, n-propyl-, iso-propyl-, n-butyl-, sec-butyl-, and tert-butylbenzene) have been measured by flow microcalorimetry. All mixtures containing an aromatic hydrocarbon as second constituent exhibit negative H ^E , while mixtures with...

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On testing quality and traceability of virgin olive oil by calorimetry

M. Angiuli, C. Ferrari, L. Lepori, E. Matteoli, more

Journal of Thermal Analysis and Calorimetry > 2006 > 84 > 1 > 105-112

Extra Virgin olive oils (7 samples) originating from different areas of Tuscany, defective olive oils (5 samples), commercial edible seed oils (4 samples) and two commercial samples of olive oil (one declared ‘extra virgin olive oil’ and one ‘olive oil’) were studied by different calorimetric techniques: high sensitivity isothermal, differential scanning, and modulated scanning calorimetry. The temperature...

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Thermodynamic study of heptane + amine mixtures - I. Excess and solvation enthalpies at 298.15 K

E. Matteoli, L. Lepori, A. Spanedda

Fluid Phase Equilibria > 2003 > 212 > 1-2 > 41-52

A newly designed calorimetric technique and calculation procedure has been used to obtain partial molar enthalpies and excess enthalpies H ^E at 298.15K for binary mixtures of heptane + primary n-alkyl (C3-C10) and branched (iso-propyl, sec-, iso-, and tert-butyl) amines in the whole composition range. All mixtures examined showed positive H ^E , which decrease with increasing amine...

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Excess molar enthalpies and excess molar heat capacities of (2-methoxyethanol + tetrahydrofuran + cyclohexane) at the temperature 298.15 K

G. Conti, P. Gianni, L. Lepori, E. Matteoli, more

The Journal of Chemical Thermodynamics > 1998 > 30 > 7 > 855-868

Excess molar enthalpies and excess molar heat capacities atT=298.15 K were determined for {x ₁ CH ₃ O(CH ₂ ) ₂ OH+(1−x ₁ )c-(CH ₂ ) ₄ O, orc-C ₆ H ₁₂ } and for {x ₁ CH ₃ O(CH ₂ ) ₂ OH+x ₂ c-(CH ₂ ) ₄ O+(1−x ₁ −x ₂ )c-C ₆ H ₁₂ }. The experimental...

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Subcritical and Supercritical Water Radial Distribution Function

H. Touba, G. A. Mansoori, E. Matteoli

International Journal of Thermophysics > 1998 > 19 > 5 > 1447-1471

A theoretical and analytic expression for the first shell, and an analytic empirical expression for the whole radial distribution function (RDF) of water are introduced. All the asymptotic limits and functionalities of the RDF with temperature and density are incorporated in these expressions. An effective Kihara pair potential function is presented for water intermolecular interactions which incorporates...

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Excess molar enthalpies and excess molar heat capacities of (chloroform + tetrahydrofuran + cyclohexane) at the temperature 298.15 K

G. Conti, P. Gianni, M. Tramati, L. Lepori, more

The Journal of Chemical Thermodynamics > 1997 > 29 > 8 > 865-877

Excess molar enthalpies and excess molar heat capacities atT=298.15 K were determined for {xCHCl ₃ +(1−x)c]-(CH ₂ ) ₄ O orc-C ₆ H ₁₂ } and for {x ₁ CHCl ₃ +x ₂ c-(CH ₂ ) ₄ O+(1−x ₁ −x ₂ )c-C ₆ H ₁₂ }. Both experimental properties were represented by a Redlich–Kister type equation. The large...

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The effect of the molecular shape on the enthalpic behaviour of liquid mixtures: cyclic hydrocarbons in heptane and tetrachloromethane

B. Marongiu, S. Porcedda, L. Lepori, E. Matteoli

Fluid Phase Equilibria > 1995 > 108 > 1-2 > 167-183

Excess enthalpies H ^E at 298.15 K have been determined by flow microcalorimetry for binary mixtures of heptane or tetrachloromethane + a cyclic hydrocarbon (cycloheptane, cyclooctane, cyclodecane, 1,2,3,4-tetrahydronaphthalene, cis-decahydronaphthalene,trans -decahydronaphthalene, bicyclohexyl). With the exception of tetrahydronaphthalene + tetrachloromethane and of trans-decahydronaphtalene...

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Search results for: E. Matteoli

Thermodynamic study of heptane+amine mixtures. V. Excess and solvation Gibbs energies

Volumetric investigation of the ternary system ethanol+dimethylformamide+cyclohexane at 298.15K

Excess Gibbs energies and volumes of the ternary system ethanol+dimethylformamide+tetrahydrofuran at 298.15K

Calorimetric investigation of the complex formation reaction of 18-crown-6 ether with d,l-alanine in water–ethanol mixtures

Molecular complex formation between l-phenylalanine and 18-crown-6 in H₂O–DMSO solvents studied by titration calorimetry at T = 298.15 K

The influence of water–ethanol mixture on the thermodynamics of complex formation between 18-crown-6 ether and l-phenylalanine

Excess enthalpies of mixtures of mono-carboxylic acid with dibutylether

Excess Gibbs energies and volumes of the ternary system chloroform+tetrahydrofuran+cyclohexane at 298.15K

Thermodynamics of complex formation in mixed solvents K and ΔH for the formation reaction of [Gly18C6] at 298.15 K

A comparative study of thermodynamic properties of binary mixtures containing perfluoroalkanes

Promoting calorimetry for olive oil authentication

I. Excess and solvation enthalpies

On testing quality and traceability of virgin olive oil by calorimetry

Thermodynamic study of heptane + amine mixtures - I. Excess and solvation enthalpies at 298.15 K

Excess molar enthalpies and excess molar heat capacities of (2-methoxyethanol + tetrahydrofuran + cyclohexane) at the temperature 298.15 K

Subcritical and Supercritical Water Radial Distribution Function

Excess molar enthalpies and excess molar heat capacities of (chloroform + tetrahydrofuran + cyclohexane) at the temperature 298.15 K

The effect of the molecular shape on the enthalpic behaviour of liquid mixtures: cyclic hydrocarbons in heptane and tetrachloromethane

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