铜在空气中生成碱式碳酸铜的热力学分析 |
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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。
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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 |
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Authors: | Zhang Yinli Fan Guang Sun Jiajuan |
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Institution: | College of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 712000, Shaanxi, China |
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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. |
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Keywords: | Cupric subcarbonate Humidity Electromotive force Gibbs free energy |
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