Results 251 to 260 of about 35,050 (341)

The standard enthalpy of formation of CH2

The Journal of Chemical Physics, 2003
High-quality ab initio quantum chemical methods, including higher-order coupled cluster and full configuration interaction benchmarks, with basis sets ranging from [C/H] [4s3p1d/2s1p] to [9s8p7d5f4g3h2i/7s6p5d4f3g2h] have been employed to obtain the best technically possible value for the standard enthalpy of formation of X̃ 3B1 CH2 and ã 1A1 CH2 ...
Attila G. Császár, Matthew L. Leininger, Viktor Szalay   +2 more
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Standard enthalpy of formation of hexamethyldisilane

J. Chem. Soc., Faraday Trans., 1991
The standard (p°= 0.1 MPa) enthalpy of formation at 298.15 K of liquid hexamethyldisilane was determined by measuring the enthalpy of its reaction with bromine to produce trimethylsilicon bromide. The required ΔfH°m[(CH3)3SiBr, I]/kJ mol–1=–330.4 ± 2.7 was determined from its enthalpy of hydrolysis in aqueous hydrobromic acid.
Geoffrey Pilcher, M. Luisa P. Leitão, Yang Meng-Yan, Robin Walsh   +3 more
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Standard Enthalpy of Formation of Lanthanum Zirconate

Journal of the American Ceramic Society, 1995
The enthalpy of formation of lanthanum zirconate, La 2 Zr 2 O 7 , which is shown to have a distorted pyrochlore structure, was determined.
Mark Bolech, Erik H. E Cordfunke, Frans J. J. G. Janssen, Alexandra Navrotsky   +3 more
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Standard enthalpy of formation of buckminsterfullerene

The Journal of Physical Chemistry, 1992
The recent discovery of an efficient synthesis of buckminsterfullerene, C 60 has opened the way to the eventual determination of its thermodynamic properties. This paper reports results of energy of combustion measurements made on ∼125-mg samples of C 60 using a specially developed technique to ensure combustion of the small samples in a conventional
W. V. Steele, R. D. Chirico, N. K. Smith, W. E. Billups, P. R. Elmore, A. E. Wheeler   +5 more
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Standard enthalpy of formation of lanthanum oxybritholites

Journal of Thermal Analysis and Calorimetry, 2006
Lanthanum-bearing silicate-oxyapatites or britholites, Ca10–xLax(PO4)6–x(SiO4)xO with 1≤x≤6, have been synthesized by solid state reaction at high temperature. They were characterized by X-ray diffraction and IR spectroscopy. Using two microcalorimeters, the heat of solution of these compounds have been measured at 298 K in a solution of nitric and ...
K. Ardhaoui, J. Rogez, A. Ben Chérifa, M. Jemal, P. Satre   +4 more
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Standard enthalpy of formation of fullerene bromide C60Br24

Moscow University Chemistry Bulletin, 2013
The enthalpy of the combustion of C60Br24 · 2Br2 has been measured using a rotating-bomb calorimeter as follows: Δ c H 0(C60Br24 · 2Br2, cr) = (−25986 ± 166) kJ/mol. The result has been used to calculate the standard enthalpy of formation, ΔfH 0(C60Br24 · 2Br2, cr ...
T. S. Papina, V. A. Luk’yanova, S. I. Troyanov, A. V. Burtsev, M. G. Serov, V. A. Ioutsi, A. G. Buyanovskaya, O. A. Levinskaya   +7 more
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The standard molar enthalpy of formation of HfMo2O8

Journal of Alloys and Compounds, 1995
The molar enthalpies of solution of HfMo2O8, Mo and HfF4 in (10 mol HF(aq) + 4.41 mol H2O2(aq)) dm−3 have been measured using an isoperibol type calorimeter. From these results and other auxiliary data, the standard molar enthalpy of formation of HfMo2O8(S) has been calculated to be ΔfHm(298.15K) = −2605.8 ± 5.9kJ mol−1.
S.R. Bharadwaj, M.S. Samant, R. Mishra, S.R. Dharwadkar, S.S. Sawant, R. Kalyanaraman   +5 more
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Machine Learning to Predict Standard Enthalpy of Formation of Hydrocarbons.

Journal of Physical Chemistry A, 2019
Thermodynamic properites of molecules are used widely in the study of reactive processes. Such properties are typically measured via experiments or calculated by a variety of computational chemistry methods. In this work, machine learning (ML) models for
Kiran K. Yalamanchi, Vincent C. O. van Oudenhoven, Francesco Tutino, M. Monge-Palacios, A. Alshehri, Xin Gao, S. Sarathy   +6 more
semanticscholar   +1 more source

The standard molar enthalpy of formation of ZrTe3O8

The Journal of Chemical Thermodynamics, 1995
Abstract The molar enthalpies of solution of HfTe 3 O 8 , TeO 2 and HfF 4 in 10 mol dm −3 HF(aq) have been measured using an isoperibol-type calorimeter. From these results and other auxiliary data, the standard molar enthalpy of formation of HfTe 3 O 8 (s) has been calculated to be Δ f H m 0 (298.15 K) = −2129.1 ± 10.1 kJ mol −1 .
S.R. Bharadwaj, M.S. Samant, R.K. Mishra, S.R. Dharwadkar, S.S. Savant, R. Kalyanaraman   +5 more
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Standard enthalpy of β-alanine formation

Moscow University Chemistry Bulletin, 2015
In an isoperibolic calorimeter with a stationary bomb, the value of the combustion energy of crystalline β-alanine (ΔcU0) was determined at 298.15 K, from which standard enthalpies of combustion (ΔcU0) and formation (ΔcU0) have been calculated. The obtained results are compared with literature data.
V. A. Lukyanova, T. S. Papina, V. A. Ioutsi, E. V. Sagadeev, A. A. Gimadeev   +4 more
openaire   +1 more source