Results 251 to 260 of about 40,257 (293)

Total phase change entropies and enthalpies. An update on fusion enthalpies and their estimation

Thermochimica Acta, 2009
Abstract 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, 1972
Abstract 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, 2005
AbstractFenoxycarb 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, Liu Yuan‐Fa, Tan Zhi‐Cheng, Jia Ying‐Qi, Yang Jian‐Wu, Wang Mei‐Han   +5 more
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Heat capacities and enthalpies of fusion of lithium and rubidium nitrates: Heat capacities, enthalpies of fusion and enthalpies of formation of the intermediate compounds Ag0.5Rb0.5NO3 and Li0.5Rb0.5NO3

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, Zamali Hmida, Khattech Ismail   +2 more
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Direct measurement of the enthalpy of fusion of diopside

Geochimica et Cosmochimica Acta, 1986
Crystalline diopside, CaMgSi2O6, was dropped directly into a Setaram “HT1500” calorimeter operating at high temperature. At 1575 < T < 1624 K, the heat content of the crystals was in excellent agreement with previously published results. Above 1634 K, a rise in the enthalpy was seen, supporting the incongruent melting reported by Kushiro.
David Ziegler, Alexandra Navrotsky
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Enthalpy of fusion and cryoscopic constant for ethylene carbonate

The Journal of Chemical Thermodynamics, 1975
Abstract Because of a discrepancy in the literature, the enthalpy of fusion of ethylene carbonate has been redetermined. The value obtained is (35.80 ± 0.20) cal th g −1 which leads to (5.32 ± 0.03) K kg mol −1 for the molar frezing-temperature-depression constant.
Thompson, Peter T., Taylor, R. E., Wood, R. H.   +2 more
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ChemInform Abstract: Determination of Enthalpy of Fusion of K3FSO4

ChemInform, 1993
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
K. ADAMKOVICOVA, L. KOSA, I. NERAD, I. PROKS, P. FELLNER   +4 more
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Estimate of Enthalpies of Formation and Fusion of Cordierite

Journal of the American Ceramic Society, 1973
The enthalpies of solution in molten 2PbO·B 2 O 3 at 690°±2°C of cordierite, Mg 2 Al 4 Si 5 O 18
A. NAVROTSKY, O. J. KLEPPA
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Estimating entropies and enthalpies of fusion of organic compounds

The Journal of Organic Chemistry, 1991
A group additivity method recently reported for estimating fusion entropies and fusion enthalpies of hydrocarbons is expanded to include both mono- and multisubstituted derivatives as well. The parameters are derived from experimental fusion enthalpies of 191 hydrocarbons and 225 monosubstituted and 233 multisubstituted hydrocarbon derivatives.
James S. Chickos, C. Marie Braton, Donald G. Hesse, Joel F. Liebman   +3 more
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Heat capacity and enthalpy of fusion of penconazole (C13H15Cl2N3)

Thermochimica Acta, 2004
Abstract Low-temperature heat capacities of penconazole (C 13 H 15 Cl 2 N 3 ) were precisely measured with an automated adiabatic calorimeter over the temperature rang from 78 to 364 K. The sample was observed to melt at 332.38±0.06 K. The molar enthalpy and entropy of fusion of the compound were determined to be 33580±11 J mol −1 , 101.03±0.02 J mol
Xiao-Hong Sun, Ji-Rong Song, Zhi-Cheng Tan, You-Ying Di, Hai-Xia Ma, Mei-Han Wang, Li-Xian Sun   +6 more
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