Results 281 to 290 of about 35,050 (341)

The standard enthalpies of formation of proline stereoisomers

Thermochimica Acta, 2012
Abstract The combustion calorimetry and differential scanning calorimetry (DSC) techniques have been employed in order to obtain the thermochemical properties of l -, d -enantiomers and racemic mixture of proline. The large negative values of the enthalpies of formation of the investigated compounds reveal their high stability.
Iulia Contineanu, Ana Neacşu, Roxana Zgîrian, Speranţa Tănăsescu, Ştefan Perişanu   +4 more
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Estimation of the Standard Enthalpy of Formation of Crystalline Alkali Metal Borates

Russian Journal of Inorganic Chemistry, 2023
A. A. Tupitsin, V. Bychinskii, M. Shtenberg, S. V. Fomichev, O. N. Koroleva   +4 more
semanticscholar   +1 more source

Standard molar enthalpy of formation of methoxyacetophenone isomers

The Journal of Chemical Thermodynamics, 2014
Abstract Values of the standard (po = 0.1 MPa) molar enthalpy of formation of 2′-, 3′- and 4′-methoxyacetophenones were derived from their standard molar energy of combustion, in oxygen, at T = 298.15 K, measured by static bomb combustion calorimetry.
Luísa M.P.F. Amaral, Victor M.F. Morais, Manuel A.V. Ribeiro da Silva   +2 more
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Thermodynamics of Cesium Molybdate-Based Single Crystals: Standard Enthalpy of Formation, Lattice Enthalpy, and Heat Capacity

Russian Journal of Inorganic Chemistry, 2023
N. Matskevich, A. N. Semerikova, V. Trifonov, D. A. Samoshkin, A. A. Chernov, S. Stankus, S. A. Luk’yanova, V. Shlegel, V. P. Zaitsev, V. A. Kuznetsov   +9 more
semanticscholar   +1 more source

High-precision standard enthalpy of formation for polycyclic aromatic hydrocarbons predicting from general connectivity based hierarchy with discrete correction of atomization energy

Frontiers of Chemical Science and Engineering, 2022
Zihan Xu, Huajie Xu, Lu Liu, Rong-pei Jiang, Haisheng Ren, Xiangyuan Li   +5 more
semanticscholar   +1 more source

Determination of the standard enthalpy of formation of iodine compounds through the G2 and G3(MP2)//B3-SBK theories

Journal of Molecular Modeling, 2022
R. Leal, Ysa Beatriz Dantas Marinho, Maria Andreizi Monteiro de Andrade, Iran da Luz Sousa   +3 more
semanticscholar   +1 more source

Standard molar enthalpies of formation of some chloropyridines

The Journal of Chemical Thermodynamics, 1997
Abstract The standard ( p °=0.1 MPa) molar enthalpies of formation Δ f H m ° for liquid 2- and 3-chloropyridine, and crystalline 2,3-, 2,5-, 2,6-, and 3,5-dichloropyridine were derived from the standard molar enthalpies of combustion Δ c H m ° at T =298.15 K in oxygen using rotating-bomb combustion calorimetry. The reaction products were: CO 2 (g)
Manuel A.V. Ribeiro da Silva, M.Agostinha R. Matos, Luı́sa M.P.F. Amaral   +2 more
openaire   +1 more source

Standard molar enthalpy of formation of rubidium diphosphate

Journal of Thermal Analysis and Calorimetry, 2014
Rubidium carbonate (Rb2CO3) and ammonium dihydrogen phosphate (NH4H2PO4) were used for synthesizing rubidium diphosphate (Rb4P2O7). The purity of the latter compound was checked up by X-ray diffraction. Rb4P2O7 was involved in an hypothetical reaction and dissolved together with the other components in a 3.85 % (m/m) phosphoric acid solution, using a C-
H. Gmati-Ben Khaled, I. Khattech, M. Jemal   +2 more
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Standard enthalpies of formation determination of lanthanum fluorbritholites

Materials Science and Engineering: B, 2020
Abstract Lanthanum–enclosing silicate–fluorapatites or britholites Ca10-xLax (PO4)6-x (SiO4)x F2 with 1 ≤ x ≤ 6, were obtained by solid state reaction at high temperature and characterized by X-ray diffraction and IR spectroscopy. The enthalpies of solution were measured in nitric acidic solution at 298.15 K using a swinging differential Tian-Calvet ...
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Standard enthalpies of formation of certain nitro compounds

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1981
1. A thermochemical study has been made of 22 nitro and fluoronitro-containing organic compounds. Their standard enthalpies of combustion and formation have been determined. 2. The contribution of certain groups and interactions to the value of ΔHf° of the nitro compounds in the condensed state have been calculated.
L. V. Kustova, E. P. Kirpichev, Yu. I. Rubtsov, V. V. Avdonin, A. G. Korepin, L. T. Eremenko   +5 more
openaire   +1 more source