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铜在空气中生成碱式碳酸铜的热力学分析
摘    要:从热力学角度研究了酸度、湿度、水的存在状态不同时,单质铜在空气中生成碱式碳酸铜的电动势及其自由能变。通过计算发现:在酸性条件下,p H的大小对于反应的自发性没有影响;大气中二氧化碳溶解达到饱和时,空气湿度增加,反应的自发性略微增加;相同条件下,水由气态变为液态时,反应的自发性增幅较大。

关 键 词:碱式碳酸铜  湿度  电动势  自由能  

Thermodynamic Analyses of Formation of Cupric Subcarbonate from Copper in Air
Authors:Zhang Yinli  Fan Guang  Sun Jiajuan
Institution:College of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 712000, Shaanxi, China
Abstract:This article studied the electromotive force and free energy change of the reaction that copper is trans- formed into cupric subcarbonate under different pH, humidity, and water states. The size of the pH value has no effect on spontaneity in the acidic pH; when atmospheric carbon dioxide reaches the saturation value and air humidity increases, the spontaneity of reaction increases slightly; when water changes from gaseous into liquid under the same conditions, the spontaneity of reaction increases.
Keywords:Cupric subcarbonate  Humidity  Electromotive force  Gibbs free energy  
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