Results 231 to 240 of about 164,402 (291)
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The Journal of Chemical Physics, 1972
Measurements have been made of [NH], [NH3], and [OH] as a function of distance from the reaction zone of a flat NH3/O2/N2 flame at atmospheric pressure. The function [NH] [H2O]2/[NH3] [OH]2 is shown to behave like the equilibrium constant for the reaction NH3+2OH→ NH+2H2O, but to be about a factor of 10 smaller than the value calculated from the JANAF ...
W. E. Kaskan, Melvin P. Nadler
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Measurements have been made of [NH], [NH3], and [OH] as a function of distance from the reaction zone of a flat NH3/O2/N2 flame at atmospheric pressure. The function [NH] [H2O]2/[NH3] [OH]2 is shown to behave like the equilibrium constant for the reaction NH3+2OH→ NH+2H2O, but to be about a factor of 10 smaller than the value calculated from the JANAF ...
W. E. Kaskan, Melvin P. Nadler
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Journal of Physics and Chemistry of Solids, 1997
Abstract The standard molar enthalpy of formation of C 70 in the crystalline state at 298.15 K has been determined as 2577.8 ± 16.2 kj mol −1 by microcombustion calorimetry.Δ f H m o (C 70 , g ) at 298.15 K was also derived, using literature data for the enthalpy of sublimation, vapour pressure, solid state heat capacity and solid state entropy ...
Hermínio P. Diogo +3 more
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Abstract The standard molar enthalpy of formation of C 70 in the crystalline state at 298.15 K has been determined as 2577.8 ± 16.2 kj mol −1 by microcombustion calorimetry.Δ f H m o (C 70 , g ) at 298.15 K was also derived, using literature data for the enthalpy of sublimation, vapour pressure, solid state heat capacity and solid state entropy ...
Hermínio P. Diogo +3 more
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Enthalpy of formation of tetramethylgermane
Journal of the Chemical Society, Faraday Transactions 2, 1986The enthalpy of formation of highly purified tetramethylgermane has been determined by combustion in oxygen at 25 atm pressure in a bomb calorimeter, followed by full quantitative analysis of the products. The enthalpy of formation at 25 °C for Ge(CH3)4 liquid is –131.1 ± 8.3 kJ mol–1 and for the gas –102.6 ± 8.3 kJ mol–1.
Leonard H. Long, Carl I. Pulford
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Enthalpy of formation of trifluorochloroethene
The Journal of Chemical Thermodynamics, 1982Abstract The standard molar enthalpy of formation of CF2 = CFCl(g) at 298.15 K derived from new measurements of the energy of combustion of liquid samples of the substance is − (505.5 ± 4.7) kJ · mol−1 in satisfactory agreement with two previous indirectly derived values.
P.A. Erastov, V.P. Kolesov
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Enthalpy of Formation of Zircon
Journal of the American Ceramic Society, 1992Using high‐temperature solution calorimetry in molten 2PbO. B 2 O 3 , the enthalpy of reaction of the formation of zircon, ZrSiO 4 , from its constituent oxides has been determined: Δ r
Adam J. G. Ellison, Alexandra Navrotsky
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Enthalpies of formation and lattice enthalpies of alkaline metal acetates
Thermochimica Acta, 2005Abstract The standard (p° = 0.1 MPa) molar enthalpies of formation in the crystalline state of the alkaline metal acetates CH3COOM (M = Li, Na, K, Rb, Cs), at T = 298.15 K, were determined by reaction-solution calorimetry as: Δ f H m ° ( C H 3 COOLi , cr ) = − ( 741.40 ± 0.95 ) kJ mol−1, Δ f H m ° (
Ana I. Aleixo +3 more
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Enthalpies of mixed-micelle formation
Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1985Critical micelle concentrations have been measured for binary mixtures of an anionic and a polyoxyethylenated non-ionic surfactant in aqueous solution. The data were used to calculate the molecular interaction parameter β in the Rubingh theory of mixed-micelle formation.
Michael J. Hey +2 more
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Enthalpy of formation of germanium trifluoride
The Journal of Chemical Physics, 1974The formation of negative ions resulting from the electron bombardment of germanium tetrafluoride has been studied as a function of the electron energy. Appearance potentials of these ions were determined and measurements of their excess kinetic energies were made for the dissociative electron attachment in order to estimate values for the enthalpy of ...
J. Ling-Fai Wang +2 more
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The enthalpy of formation of bromophosgene
The Journal of Chemical Thermodynamics, 1972Abstract The equilibrium between carbon monoxide, bromine, and bromophosgene has been studied in the temperature range 150 to 200 °C. The equilibrium was approached in both directions and a third-law treatment of the results leads to a value of δH o f (COBr 2 ,g,298.15K) =−(27.13±0.12) kcal th mol −1 in good ...
B.K. Dunning, H.O. Pritchard
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Enthalpy of Formation of Dibutyl Phthalate
International Journal of Thermophysics, 2004Standard enthalpy of formation of liquid dibutyl phthalate (DBP, −864.67± 4.77kJċmol−1) was determined by combustion calorimetry. Using this value, the reliability of the known enthalpies of formation for alkyl phthalates was assessed.
Yu. V. Maksimuk, K. Ruzicka, V. V. Diky
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