Results 271 to 280 of about 35,050 (341)

Standard enthalpies of formation of sodium alkoxides

Journal of Organometallic Chemistry, 1991
Abstract The standard enthalpies of formation of several crystalline sodium alkoxides, Δ H o f (NaOR, cr), have been determined by reaction-solution calorimetry. A linear correlation has been found between Δ H O f (NaOR, cr) and Δ H o f (ROH, 1/cr) for R = n-alkyl, enabling the prediction of data for other sodium alkoxides.
João Paulo Leal, A.Pires de Matos, J.A.Martinho Simões   +2 more
openaire   +1 more source

Standard enthalpy of formation of neodymium fluorbritholites

Thermochimica Acta, 2006
Abstract Neodymium-bearing silicate-fluorapatites Ca 10− x Nd x (PO 4 ) 6− x (SiO 4 ) x F 2 with 1 ≤  x  ≤ 6 have been synthesized by solid state reaction at high temperature. The heat of solution in 46 wt% nitric acid has been measured at 298 K with a differential calorimeter.
K. Ardhaoui, M.V. Coulet, A. Ben Chérifa, J. Carpena, J. Rogez, M. Jemal   +5 more
openaire   +1 more source

Standard molar enthalpies of formation of dimethylbenzophenones

Journal of Physical Organic Chemistry, 2008
AbstractThe standard (p0 = 0.1 MPa) molar enthalpy of formation of 3,4‐dimethylbenzophenone was derived from the standard molar energy of combustion, in oxygen, at T = 298.15 K, measured by static bomb combustion calorimetry. The Calvet high temperature vacuum sublimation technique was used to measure the enthalpy of sublimation of the compound.
José R. B. Gomes, Luísa M. P. F. Amaral, Manuel A. V. Ribeiro da Silva   +2 more
openaire   +1 more source

The standard enthalpy of formation of In2O3

The Journal of Chemical Thermodynamics, 1991
The standard molar enthalpy of formation of In 2 O 3 (s) has been derived from its enthalpy of solution in 9.33 mol·dm −3 HCl(aq), in combination with Δ f H o m auxiliary values. The value Δ f H o m (298.15 K) = −(922.9±1.0) kJ·mol −1 has been obtained.
E.H.P. Cordfunke, R.J.M. Konings, W. Ouweltjes   +2 more
openaire   +1 more source

Standard enthalpy of formation of platinic acid

The Journal of Chemical Thermodynamics, 2002
Abstract Platinic acid, H2Pt(OH)6 hydrogen hexahydroxyplatinate (IV), was burned with benzoic acid and thermally decomposed to metallic platinum, liquid water, and oxygen gas in a micro-combustion calorimeter. The standard enthalpy of formation of platinic acid in the crystalline state was determined to be −(1287.9±3.6) kJ · mol −1 at
openaire   +1 more source

Standard enthalpy of formation of lithium diphosphate

The Journal of Chemical Thermodynamics, 2013
Abstract Lithium carbonate (Li2CO3) and ammonium dihydrogen phosphate (NH4H2PO4) were used for synthesizing lithium diphosphate (Li4P2O7). The purity of the latter compound was checked up by X-ray diffraction. The heat of dissolution of (Li4P2O7) in phosphoric acid solution was measured in a C-80 SETARAM calorimeter.
H. Gmati-Ben Khaled, I. Khattech, M. Jemal   +2 more
openaire   +1 more source

Preparation, characterization and standard enthalpy of formation of Sr2CeO4

Journal of Thermal Analysis and Calorimetry, 2004
Sr2CeO4 has been prepared by sol-combustion and co-precipitate routes and the resulting products have been characterized by XRD analysis. The molar enthalpies of solution of Sr2CeO4, Sr(NO3)2(s) and Ce(NO3)3·6H2O(s) in 0.150 dm3 of (4.41 mol dm3 H2O2+4.23 mol dm-3 of HNO3) solvent as well as the molar enthalpies of solution of Sr2CeO4(s), SrCl2(s) and ...
M. Ali Basu, R. V. Wandekar, S. R. Bharadwaj, D. Das   +3 more
openaire   +1 more source

Standard molar enthalpy of formation, vapour pressures, and standard molar enthalpy of sublimation of benzanthrone

The Journal of Chemical Thermodynamics, 1999
Abstract The standard ( p o  =  0.1 MPa) molar enthalpy of combustion at T  =  298.15 K of crystalline benzanthrone was determined as Δ c H m o  =  − (8114.7  ±  2.0) kJ · mol  − 1 by static-bomb calorimetry, and the standard molar enthalpy of formation of the crystal at T  =  298.15 K was derived as Δ f H m o ( cr )  =  − (4 ...
Manuel A.V. Ribeiro da Silva, M.Luísa C.C.H. Ferrão, Manuel J.S. Monte, Jorge M. Gonçalves, Fang Jiye   +4 more
openaire   +1 more source

Vapor Pressure, Vaporization Enthalpy, Standard Enthalpy of Formation and Standard Entropy of n-Butyl Carbamate

Chinese Journal of Chemical Engineering, 2014
Abstract The vapor pressures of n -butyl carbamate were measured in the temperature range from 372.37 K to 479.27 K and fitted with Antoine equation. The compressibility factor of the vapor was calculated with the Virial equation and the second virial coefficient was determined by the Vetere model.
Zuoxiang Zeng, Zhihong Yang, Weilan Xue, Xiaonan Li   +3 more
openaire   +1 more source

Enthalpies of solution and standard enthalpy of formation of crystalline NaVO3 · 2H2O

Russian Journal of Inorganic Chemistry, 2011
The enthalpies of solution of sodium metavanadate dihydrate in aqueous solutions of sodium perchlorate at ionic strength I = 0.3, 0.5, and 1.0 mol/L were calorimetrically measured at 298.15 K. The resulting experimental data were used to calculate the standard enthalpy of formation of crystalline NaVO3 · 2H2O.
P. A. Romodanovskii, N. G. Dmitrieva, S. N. Gridchin, P. N. Vorob’ev   +3 more
openaire   +1 more source