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。
This article studied the electromotive force and free energy change of the reaction that copper is transformed into cupric subcarbonate under different p H,humidity,and water states. The size of the p H value has no effect on spontaneity in the acidic p H; 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.