Thermodynamic properties of lithium amide under hydrogen pressure determined by Raman spectroscopy
Thermodynamic properties of lithium amide under hydrogen pressure determined by Raman spectroscopy
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DOI：
10.1063/1.3073995
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发表时间：
2009-01
影响因子：
3.2
通讯作者：
S. Hino;N. Ogita;M. Udagawa;T. Ichikawa;Y. Kojima
中科院分区：
文献类型：
--
作者：
S. Hino;N. Ogita;M. Udagawa;T. Ichikawa;Y. Kojima
采用拉曼光谱法测定了不同温度下氨基锂与氢气反应生成氢化锂与氨水反应的分压和平衡常数，确定了反应的标准焓ΔHo和标准熵ΔSo。利用拉曼光谱测量了氨基化锂在氢气气氛下热处理后气态产物中氨的分压。氨和氢的分压分数的范特霍夫图表明ΔHo=49.9±9.1 kJ mol−1，ΔSo=59±16 J mol−1 K−1。
Partial pressures and equilibrium constants for the reaction from lithium amide and hydrogen to lithium hydride and ammonia at different temperatures were evaluated by Raman spectroscopy to determine standard enthalpy ΔHo and entropy ΔSo of the reaction. Raman intensity measurements were used for estimating ammonia partial pressures in gaseous products after heat treatment of lithium amide under hydrogen atmosphere. The van’t Hoff plot of fractions of the partial pressures of ammonia and hydrogen indicated ΔHo=49.9±9.1 kJ mol−1 and ΔSo=59±16 J mol−1 K−1.