ChemInform Abstract: STANDARD MOLAR ENTHALPY OF FORMATION OF LANTHANUM HEXABORIDE (LAB6) BY HIGH-TEMPERATURE CALORIMETRY

1985 ◽  
Vol 16 (2) ◽  
Author(s):  
L. TOPOR ◽  
O. J. KLEPPA
Keyword(s):  
High Temperature ◽  
Enthalpy Of Formation ◽  
Lanthanum Hexaboride ◽  
Molar Enthalpy ◽  
Standard Molar Enthalpy

Thermochemistry of uranium compounds. XVI. Calorimetric determination of the standard molar enthalpy of formation at 298.15 K, low-temperature heat capacity, and high-temperature enthalpy increments of UO2(OH2)•H2O (schoepite)

1988 ◽  
Vol 66 (4) ◽  
pp. 620-625 ◽  
Author(s):  
I.R. Tasker ◽  
P. A. G. O'Hare ◽  
Brett M. lewis ◽  
G. K. Johnson ◽  
E. H. P. Cordfunke
Keyword(s):  
Heat Capacity ◽  
High Temperature ◽  
Low Temperature ◽  
Thermodynamic Properties ◽  
Enthalpy Of Formation ◽  
Molar Heat Capacity ◽  
Temperature Drop ◽  
Molar Enthalpy ◽  
Standard Molar Enthalpy ◽  
Enthalpy Increments

Three precise calorimetric methods, viz., low-temperature adiabatic, high-temperature drop, and solution-reaction, have been used to determine as a function of temperature the key chemical thermodynamic properties of a pure sample of schoepite, UO2(OH)2•H2O. The following results have been obtained at the standard reference temperature T = 298.15 K: standard molar enthalpy of formation [Formula: see text] molar heat capacity [Formula: see text] and the standard molar entropy [Formula: see text] The molar enthalpy increments relative to 298.15 K and the molar heat capacity are given by the polynomials: [Formula: see text] and [Formula: see text], where 298.15 K < T < 400 K. The present result for [Formula: see text] at 298.15 K has been combined with three other closely-agreeing values from the literature to give a recommended weighted mean [Formula: see text] from which is calculated the standard Gibbs energy of formation [Formula: see text] at 298.15 K. Complete thermodynamic properties of schoepite are tabulated from 298.15 to 423.15 K.

The standard molar enthalpy of formation of Cs2ZrO3

1987 ◽  
Vol 19 (10) ◽  
pp. 1117-1120 ◽  
Author(s):  
E.H.P Cordfunke ◽  
W Ouweltjes ◽  
P.Van Vlaanderen
Keyword(s):  
Enthalpy Of Formation ◽  
Molar Enthalpy ◽  
Standard Molar Enthalpy

Determination of the standard molar enthalpy of formation of α-AlOOH (diaspore)

1995 ◽  
Vol 27 (4) ◽  
pp. 443-446 ◽  
Author(s):  
Chen Qiyuan ◽  
Zeng Wenming ◽  
Gu Songqing ◽  
Yang Guanqun ◽  
Zhou Huifang ◽  
...  
Keyword(s):  
Enthalpy Of Formation ◽  
Molar Enthalpy ◽  
Standard Molar Enthalpy
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