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Solution enthalpies of hydroxylic compounds

Study of solvent effects through quantitative structure property relationships

Journal of Thermal Analysis and Calorimetry
Authors: Marina Reis, Luís Moreira, Nelson Nunes, Ruben Leitão, and Filomena Martins

molecular interactions in solution. As such, they enclose valuable information that can be unraveled using QSPR techniques. Formally, the solution enthalpy of a given solute A in a solvent S can be partitioned into three energetic contributions

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data of the standard molar enthalpy of formation plays an important role in theoretical study, application development and industrial production of a compound as a basis of theoretical analysis. In this article, ZnO nanosheets with uniform size

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the elaboration and characterisation of “A” type phosphobaryum carbonate hydroxyapatites Ba 10 (PO 4 ) 6 (OH) (2−2 x ) (CO 3 ) x . Calorimetric study has been performed to determine the formation enthalpy of these compounds. The latter quantity is

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Journal of Thermal Analysis and Calorimetry
Authors: B. Marongiu, Silvia Porcedda, D. Falconieri, Alessandra Piras, E. Matteoli, and L. Lepori

and excess enthalpies, H E . Experimental Materials All organic chemicals were high purity reagents purchased from Sigma-Aldrich and were used without further purification. Their properties and

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techniques, leading to the determination of the immersion enthalpy as a thermodynamic parameter characterization for a specific system [ 1 , 2 ]. Assuming that the system is composed of solid and liquid, it can be assumed that the immersion enthalpy

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, thermodynamic studies at low concentration, of less than 0.05 mol kg −1 , are scarce; in the literature, data are found for partial molar volumes at molar concentrations above 0.05 mol L −1 [ 6 ] and it is only possible to find data of enthalpies of solution at

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Journal of Thermal Analysis and Calorimetry
Authors: J. Botelho, A. Souza, L. Nunes, A. Chagas, I. Garcia dos Santos, M. da Conceição, and P. Dunstan

Abstract  

The standard molar enthalpies of formation of crystalline dialkyldithiocarbamates chelates, [Pd(S2CNR2)2], with R=C2H5, n-C3H7, n-C4H9 and i-C4H9, were determined through reaction-solution calorimetry in acetone, at 298.15 K. From the standard molar enthalpies of formation of the gaseous chelates, the homolytic (172.43.8, 182.53.2,150.93.1 and 162.63.1 kJ mol−1) and heterolytic (745.03.8, 803.73.3,834.33.1 and 735.23.0 kJ mol−1) mean palladium-sulphur bond-dissociation enthalpies were calculated.

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enthalpies of formation have also been measured by calorimetry, a universal technique widely used for the measurements of enthalpies of reaction, dissolution and excess enthalpies in thermochemistry. These data of the standard molar formation enthalpy plays

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as the melting point and molar melting enthalpy of taurine were determined by Differential Scanning Calorimetry (DSC), the relation between the specific heat capacity and temperature was discussed, and the constant-volume combustion energies of the

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Introduction The isothermal mixing of ( o + m ), ( o + p ), ( m + p )-isomers, which show small enthalpy change, can be explained in terms of differences in the intermolecular interaction between pairs of like and unlike

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