大学化学 >> 2016, Vol. 31 >> Issue (4): 80-82.doi: 10.3866/PKU.DXHX20160480

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铁粉与氯气反应能生成二氯化铁吗?

孙家娟,范广*(),张引莉,马占营,高丰琴,徐维霞   

  • 发布日期:2016-05-06
  • 通讯作者: 范广 E-mail:fanguang2004@163.com
  • 基金资助:
    陕西公办本科高等学校教育教学研究项目(13BZ52);陕西省化学专业复合型人才培养模式创新试验区项目(陕教高[2014]16号,第57项)

Can Iron Powder React with Chlorine to Produce Iron(Ⅱ) Dichloride?

Jia-Juan SUN,Guang FAN*(),Yin-Li ZHANG,Zhan-Ying MA,Feng-Qin GAO,Wei-Xia XU   

  • Published:2016-05-06
  • Contact: Guang FAN E-mail:fanguang2004@163.com
  • Supported by:
    陕西公办本科高等学校教育教学研究项目(13BZ52);陕西省化学专业复合型人才培养模式创新试验区项目(陕教高[2014]16号,第57项)

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摘要：

从化学热力学基本原理出发,解释了在合适的反应温度下,铁粉与氯气反应生成三氯化铁的原因。并通过吉布斯-亥姆霍兹方程计算得出,在反应温度高于626 K时,铁粉与氯气反应将生成二氯化铁。这既体现了化学热力学对无机合成的指导意义,又可增强学生对化学热力学知识的理解和应用。

关键词: 化学热力学, 氯化亚铁, 氯化铁, 吉布斯-亥姆霍兹方程

Abstract:

In this article, the reason that the iron powder reacts with chlorine to produce iron(Ⅲ) trichloride under appropriate conditions is explained according to fundamentals of chemical thermodynamics. And the calculation result from Gibbs-Helmholtz equation reveals that the iron powder can react with chlorine to produce iron(Ⅱ) dichloride at the temperature higher than 626 K. The calculation can not only reflect the guidance of chemical thermodynamics on inorganic synthesis, but also enhance students' ability to comprehend and apply chemical thermodynamics basic knowledge.

Key words: Chemical thermodynamics, Iron dichloride, Iron trichloride, Gibbs-Helmholtz equation