Cu3(PO4)2·3H2O的热力学和热化学性质

IF 0.5 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY
A. Kozma, N. Golub, Yevhenii Golub, V. Sidey, A. Solomon, A. Kuznietsova, Y. Herneshii
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引用次数: 1

摘要

以Cu(NO3)2·3H2O、NH4OH和H3PO4为原料,在水溶液中通过交换化学反应合成了正磷酸铜(II)三水合Cu3(PO4)2·3H2O。采用原子吸收光谱(AAS)、红外光谱(IRS)、差热分析(DTA)和x射线粉末衍射(XRD)技术对最终产物进行了表征。首次研究了Cu3(PO4)2·3H2O在198 ~ 402 K范围内的实验热容Ср°。将实验结果与文献数据相结合,可以确定标题化合物的热力学和热化学性质,如焓НТ°、熵SТ°、吉布斯能GТ°、生成焓ΔHf°(T)、吉布斯生成能ΔGf°(T)和生成反应对数平衡常数[Kf°(T)]的对数。结果表明,在实验的极端温度下,Cu3(PO4)2·3H2O在198 K时的反应性质为Ср°= 245.96 J·mol-1·K - 1, Н°= -3169.59 kJ·mol-1, S°= 311.34 J·mol-1·K - 1, G°= -3231.24 kJ·mol-1;Ср°= 455.31 J·mol-1·K - 1,Н°= -3097.93 kJ·mol-1, S°= 551.48 J·mol-1·K - 1, G°= -3319.62 kJ·mol-1Δ高频°= -3138.48 kJ·mol-1,ΔGf°= -2625.39 kJ·mol-1,日志(K) = 341.13 (402 K)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Thermodynamic and thermochemical properties of Cu3(PO4)2·3H2O
Copper (II) orthophosphate trihydrate Cu3(PO4)2·3H2O has been synthesized by the exchange chemical reactions in aqueous solutions from the compounds Cu(NO3)2·3H2O, NH4OH and H3PO4. The final product has been investigated by using atomic absorption spectroscopy (AAS), infrared spectrometry (IRS), differential thermal analysis (DTA) and X-ray powder diffraction (XRD) techniques. For the first time, the experimental heat capacity Ср° of Cu3(PO4)2·3H2O has been investigated in the temperature range 198‒402 K. Combining the experimental results with the literature data made it possible to determine the thermodynamic and thermochemical properties, such as enthalpy НТ° , entropy SТ° , Gibbs energy GТ° , enthalpy of formation ΔHf°(T), Gibbs energy of formation ΔGf°(T) and logarithm of the equilibrium constant of formation reaction log[Kf°(T)], for the title compound. It was found that at the extreme temperatures of the experiment, Cu3(PO4)2·3H2O has Ср° = 245.96 J·mol–1·K–1, Н° = –3169.59 kJ·mol–1, S° = 311.34 J·mol–1·K–1, G° = –3231.24 kJ·mol–1 (at 198 K); Ср° = 455.31 J·mol–1·K–1, Н° = –3097.93 kJ·mol–1, S° = 551.48 J·mol–1·K–1, G° = –3319.62 kJ·mol–1, ΔHf° = –3138.48 kJ·mol–1, ΔGf° = –2625.39 kJ·mol–1, log[K ] = 341.13 (at 402 K).
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来源期刊
Chemija
Chemija 化学-化学综合
CiteScore
1.30
自引率
16.70%
发文量
14
审稿时长
>12 weeks
期刊介绍: Chemija publishes original research articles and reviews from all branches of modern chemistry, including physical, inorganic, analytical, organic, polymer chemistry, electrochemistry, and multidisciplinary approaches.
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