scholarly journals Thermochemistry of the lower bromides of tantalum

1980 ◽  
Vol 58 (9) ◽  
pp. 938-941 ◽  
Author(s):  
Alan D. Westland
Keyword(s):  
Enthalpy Of Formation ◽  
Standard Enthalpy ◽  
Solution Calorimetry ◽  
Heat Capacities ◽  
Enthalpies Of Formation ◽  
Standard Enthalpy Of Formation

The standard enthalpy of formation of tantalum(IV) bromide has been determined by solution calorimetry: ΔHf0(TaBr4(c) 298 K) = −125.6 ± 0.5 kcal mol−1. Experimental estimates of the enthalpies of formation of tantalum(III) bromide and tantalum(II,III) bromide were also obtained. Estimates of the entropies and heat capacities of the compounds are also given.

Calorimetric determination of the enthalpy of formation of InN and comparison with AlN and GaN

2001 ◽  
Vol 16 (10) ◽  
pp. 2824-2831 ◽  
Author(s):  
M. R. Ranade ◽  
F. Tessier ◽  
A. Navrotsky ◽  
R. Marchand
Keyword(s):  
Enthalpy Of Formation ◽  
Standard Enthalpy ◽  
Sodium Molybdate ◽  
Solution Calorimetry ◽  
Large Error ◽  
Area Measurement ◽  
Enthalpies Of Formation ◽  
Standard Enthalpy Of Formation ◽  
Straight Line ◽  
The Enthalpy Of Formation

The standard enthalpy of formation of InN at 298 K has been determined using high-temperature oxidative drop solution calorimetry in a molten sodium molybdate solvent at 975 K. Calorimetric measurements were performed on six InN samples with varying nitrogen contents. The samples were characterized using x-ray diffraction, chemical analysis, electron microprobe analysis, and Brunauer–Emmett–Teller surface area measurement. The variation of the enthalpy of drop solution (kJ/g) with nitrogen content is approximately linear. The data, when extrapolated to stoichiometric InN, yield a standard enthalpy of formation from the elements of ?28.6 ± 9.2 kJ/mol. The relatively large error results from the deviation of individual points from the straight line rather than uncertainties in each set of data for a given sample. This new directly measured enthalpy of formation is in good agreement with the old combustion calorimetric result by Hahn and Juza (1940). However, this calorimetric enthalpy of formation is significantly different from the enthalpy of formation values derived from the temperature dependence of the apparent decomposition pressure of nitrogen over InN. A literature survey of the enthalpies of formation of III–N nitride compounds is presented.

Standard enthalpy of formation and heat capacities of 3,5-di-tert-butylsalicylic acid

2003 ◽  
Vol 404 (1-2) ◽  
pp. 89-95 ◽  
Author(s):  
Hua-Guang Yu ◽  
Zhi-Cheng Tan ◽  
Yi Liu ◽  
Xiao-Zheng Lan ◽  
Fen Xu ◽  
...  
Keyword(s):  
Enthalpy Of Formation ◽  
Standard Enthalpy ◽  
Heat Capacities ◽  
Standard Enthalpy Of Formation

ChemInform Abstract: Standard Enthalpy of Formation of Hexamethyldisilane.

ChemInform ◽  
2010 ◽  
Vol 22 (27) ◽  
pp. no-no
Author(s):  
G. PILCHER ◽  
M. L. P. LEITAO ◽  
M.-Y. YANG ◽  
R. WALSH
Keyword(s):  
Enthalpy Of Formation ◽  
Standard Enthalpy ◽  
Standard Enthalpy Of Formation

Estimation of the standard enthalpy of formation of double oxide

1998 ◽  
Vol 267 (1-2) ◽  
pp. 6-10 ◽  
Author(s):  
Weidong Zhuang ◽  
Jingkui Liang ◽  
Zhiyu Qiao ◽  
Jianyun Shen ◽  
Ying Shi ◽  
...  
Keyword(s):  
Enthalpy Of Formation ◽  
Standard Enthalpy ◽  
Standard Enthalpy Of Formation ◽  
Double Oxide
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