大学化学 >> 2015, Vol. 30 >> Issue (5): 55-58.doi: 10.3866/pku.DXHX20150555

师生笔谈 上一篇    下一篇

铜在空气中生成碱式碳酸铜的热力学分析

张引莉, 范广, 孙家娟   

  1. 咸阳师范学院化学与化工学院 陕西咸阳 712000
  • 发布日期:2015-10-24
  • 通讯作者: 张引莉 E-mail:zhangyl801128@163.com
  • 基金资助:

    咸阳师范学院教改项目(No.201302016);咸阳师范学院专项科研基金资助项目(No.11XSYK205);陕西公办普通本科高等学校教学改革研究项目(13BZ52);2014年陕西本科高校省级人才培养模式创新实验区项目(陕教高[2014]16号, 第57项)

Thermodynamic Analyses of Formation of Cupric Subcarbonate from Copper in Air

Zhang Yinli, Fan Guang, Sun Jiajuan   

  1. College of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 712000, Shaanxi, China
  • Published:2015-10-24

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, pH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

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.

Key words: Cupric subcarbonate, Humidity, Electromotive force, Gibbs free energy

MSC2000: 

  • O6