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Article
Thermodynamic properties of organic compounds
By employing calorimetric and cryometric methods, the melting total and the premelting enthalpies of stearic acid were measured and the phase diagrams of the solid-liquid equilibria stearic acid +A (whereA is an ...
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Article
Thermodynamic properties of organic compounds
DSC measurements were used to calculateT t,δH t,δS t,T f,δH f andδS f for ten aliphatic dicarboxylic acids, azobenzene and benzhydrol. δStot follows a regular function of the C-atom number of the aliphatic chain.
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Article
Thermodynamic properties of organic compounds. Note III
Calorimetric and cryometric methods are employed to measure the enthalpies of fusion and prefusion of some organic acids.
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Article
Thermodynamic properties of organic compounds
Calorimetric and cryometric methods were employed to measure the enthalpy and entropy of fusion of caprylamide and stearamide.
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Article
Dependence of the viscosities of some organic aliphatic acids on temperature and molar volume
The viscosities of some aliphatic acids were measured in the vicinity of the melting point with a Höppler viscosimeter. The dependence of the viscosity on the molar volume permitted calculation of the covolume...
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Article
The covolumes of the fused aliphatic acids from C9 to C18 and of C2, from viscosity measurements
The results of measurements of the viscosities and molar volumes of the organic acids (C9–C18) as functions of the temperature are reported. They are discussed in connection with the equations of Arrhenius and Ba...
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Article
The liquid-liquid and liquid-solid equilibria in some binary systems containing alkali metal stearates
The characteristics are submitted of the crystallization curves of binary systems composed of sodium or potassium stearate as one component and succinic, glutaric, adipic, pimelic, suberic or azelaic acid as t...
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Article
The miscibility gaps in monocarboxylic-dicarboxylic aliphatic acid mixtures
The characteristics of the eutectic points and of the miscibility gaps are submitted for binary systems composed of margaric, palmitic or pentadecanoic acid as one component and succinic, glutaric or adipic ac...
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Article
The phase equilibria in some binary systems containing stearic alcohol
The liquid — liquid and liquid — solid equilibrium temperatures are taken for the binary systems octadecanol + A (A=dicarboxylic acids, biphenyl or (K, Na) stearate). The results are discussed and a relation c...
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Article
Fusion entropy and melt viscosity in some aliphatic hydrocarbons. Relation between fusion entropy and parameterb of the Batchinski equation
The fusion entropy, viscosity and molar volume are measured for the following hydrocarbons: C18H38, C19H40, C20H42 and C20H40. A relation betweenδS fus and the parameterb of the Batchinski equation is given for t...
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Article
A correlation between the extension of the miscibility gaps and the nature of the components in some binary systems
The liquid-liquid equilibrium regions in binary systems, one component of which is a dicarboxylic aliphatic acid, are examined by the linear equation in (x 1/x′1)=a+bT. Theb term is plottedvs. the difference of p...
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Article
Ultrasonic velocity, isothermal compressibility, free volume andP i/T f values in molten stearic, palmitic and lauric acids. Reflections on fusion
Ultrasonic measurements on molten stearic, palmitic and lauric acids enable us to calculate the internal pressure (P i), free volume, isoentropic compressibility, isothermal compressibility and heat capacity at c...
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Article
Errata
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Article
Miscibility gaps in methyl nonadecanoate+dicarboxylic acid binary systems
The liquid-liquid and liquid-solid equilibria of the binary systems composed of methyl nonadecanoate and some aliphatic acids or stearic alcohol or diphenyl are presented; the enthalpy of fusion of the ester i...
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Article
Supercooling phenomena in the binary systems: Acetamide-electrolytes
This paper presents a final discussion on studies of solutions of electrolytes in molten acetamide. These studies deal with cryoscopic and ultrasonic (by shear waves) techniques and reveal the complexity of th...
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Article
Acetamide-ammonium sulfamate
Molten mixtures of acetamide and ammonium sulfamate (indicated here AS) are reacted at mole fractionX AS<0.35 to produce (NH4)2SO4 and CH3CN. The experimental conditions and analytical methods adopted are given a...
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Article
Thermal reaction of clCH2CONH2 in molten acetamide
Mixtures composed of amides and electrolytes exhibit interesting properties such as viscoelastic behaviour and a megavalue of the dielectric constant. In order to improve the dielectric properties, the authors...
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Article
Effect of acoustic radiation on the thermally unstable system: CF3COONa+ClCH2CONH2
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Article
Cryoscopic and dynamic study of the molten system fluoroacetamide-sodium trifluoroacetate
The behavior of the molten system acetamide-electrolyte, including the peculiarity of the structure and the consequent relevant properties, such as the megavalue of the dielectric constant, was reported earlie...
