Results 271 to 280 of about 40,153 (337)
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Fusion enthalpy and entropy of isotactic polypropylene
European Polymer Journal, 1968Abstract The “equilibrium melting temperature” of isotactic polypropylene and of a number of its mixtures with hexadecane, α-chloronaphthalene, decalin and naphthalene is determined by extrapolation of several experimental melting temperature data obtained by rapid melting of each sample isothermally crystallized at different temperatures.
F. Danusso, G. Gianotti
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The Enthalpy of Fusion of Gallium
Journal of Chemical & Engineering Data, 2002An adiabatic calorimeter was used to measure the enthalpy of fusion of a very pure sample of gallium. The new value of the enthalpy of fusion was determined to be ΔfusH = 80.097 ± 0.032 J·g-1, where the uncertainty corresponded to a 95% confidence interval. A comparison with previous determinations is made.
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Thermochimica Acta, 2004
Molar enthalpies of sublimation of 1,2,4-, 1,2,3-, and 1,3,5-tri-hydroxy-benzene, were obtained from the temperature dependence of the vapor pressure measured by the transpiration method. The molar enthalpies of fusion and molar heat capacities of these compounds were measured by DSC.
Sergey P Verevkin, Christoph Schick
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Molar enthalpies of sublimation of 1,2,4-, 1,2,3-, and 1,3,5-tri-hydroxy-benzene, were obtained from the temperature dependence of the vapor pressure measured by the transpiration method. The molar enthalpies of fusion and molar heat capacities of these compounds were measured by DSC.
Sergey P Verevkin, Christoph Schick
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Thermochimica Acta, 2016
© 2016 Elsevier B.V. All rights reserved.Enthalpy of sublimation of solid compound can be found using the values of solution enthalpy and solvation enthalpy in any solvent. In this work enthalpies of solution at infinite dilution of a number of aromatic hydrocarbons derivatives in benzene were measured at 298.15 K.
Solomonov B. +4 more
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© 2016 Elsevier B.V. All rights reserved.Enthalpy of sublimation of solid compound can be found using the values of solution enthalpy and solvation enthalpy in any solvent. In this work enthalpies of solution at infinite dilution of a number of aromatic hydrocarbons derivatives in benzene were measured at 298.15 K.
Solomonov B. +4 more
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Estimating entropies and enthalpies of fusion of hydrocarbons
The Journal of Organic Chemistry, 1990A group additivity method for estimating fusion entropies and fusion enthalpies is described. The method is based on experimental fusion enthalpies of 191 hydrocarbons. Group values are provided for most structural environments. Applications of the technique are described, and comparisons with literature values and other estimation techniques are also ...
James S. Chickos +2 more
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Determination of the enthalpy of fusion of K3NbO2F4
Chemical Papers, 2011AbstractAreas of fusion and crystallization peaks of K3NbO2F4 were measured using the DCS mode of a high-temperature calorimeter (SETARAM 1800 K). On the basis of these quantities, considering the temperature dependence of the calorimeter sensitivity, the value of the fusion enthalpy of K3NbO2F4 of (98 ± 6) kJ mol−1 was determined at the fusion ...
Ladislav Kosa, Iveta Macková
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Total phase change entropies and enthalpies. An update on fusion enthalpies and their estimation
Thermochimica Acta, 2009Abstract This compendium summarizes the fusion enthalpies of approximately 1000 new measurements. A group additivity method developed to estimate the total phase change entropies and enthalpies of organic solids is updated, applied to the new data and the results are compared.
James S. Chickos, William E. Acree
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Enthalpy of uranium tetrafluoride from 298–1400°K: enthalpy and entropy of fusion
Journal of Inorganic and Nuclear Chemistry, 1972Abstract The enthalpy of UF 4 from room temperature up into the liquid phase has been measured in order to clarify some questionable thermochemical behavior reported in the literature. Our measured entropy of fusion for UF 4 of 8·6 cal °K −1 mol −1 is considerably lower than the 12·7 cal °K −1 mol −1 reported for the isostructural compound ZrF ...
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Heat Capacity and Enthalpy of Fusion of Fenoxycarb
Chinese Journal of Chemistry, 2005AbstractFenoxycarb was synthesized and its heat capacities were precisely measured with an automated adiabatic calorimeter over the temperature range from 79 to 360 K. The sample was observed to melt at (326.31±0.14) K. The molar enthalpy and entropy of fusion as well as the chemical purity of the compound were determined to be (26.98±0.04) kJ·mol‐1 ...
Sun Xiao‐Hong +5 more
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Thermochimica Acta, 2013
a b s t r a c t Due to the numerous applications of the alkali nitrate–silver nitrate systems (chemical processes, metallurgical research, transfers of thermal energy produced from solar radiation, etc.), the thermochemical properties and the phase diagram are important sources of information for a better exploitation of these systems.
Hichri Monia +2 more
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a b s t r a c t Due to the numerous applications of the alkali nitrate–silver nitrate systems (chemical processes, metallurgical research, transfers of thermal energy produced from solar radiation, etc.), the thermochemical properties and the phase diagram are important sources of information for a better exploitation of these systems.
Hichri Monia +2 more
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