Thermodynamics of the Sublimation of Calcium Molybdate

被引：4
|
作者：
Kazenas, E. K. [1 ]
Tsvetkov, Yu. V. [1 ]
Astakhova, G. K. [1 ]
Volchenkova, V. A. [1 ]
机构：
[1] Russian Acad Sci, Baikov Inst Met & Mat Sci, Leninskii Pr 49, Moscow 119334, Russia
来源：
RUSSIAN METALLURGY | 2006年 / 02期
关键词：
D O I：
10.1134/S003602950602008X
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The sublimation of CaMoO4(s) is studied by high-temperature mass spectrometry at 1530-1770 K. CaMoO4(g) and MoO3(g) molecules are found to be present in the vapor; their vapor pressure is determined. The pressure of the CaMoO4(g) molecule vapor is determined to be log p = - 19 685/T + 5.52. The heat of sublimation Delta H-s,0(o) (CaMoO4(s)) = 446 +/- 40 kJ/mol has been determined using the third law of thermodynamics. The atomization energy of the CaMoO4(g) molecules is calculated to be Delta H-at,0(o) (CaMoO4(g)) = 2910 +/- 40 kJ/mol.
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页码：147 / 149
页数：3
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