| 有镁热反应吗——由一道高考化学题引起的思考 |
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| 引用本文： | 邢泰宇,万如锴,杨军军.有镁热反应吗——由一道高考化学题引起的思考[J].化学教育,2020,41(7):92-95. |
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| 作者姓名： | 邢泰宇 万如锴 杨军军 |
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| 作者单位： | 湖北省应城市第一高级中学 湖北应城 432400 |
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| 摘 要： | 通过近似计算2Al＋Fe2O3=2Fe＋Al2O3,3Mg＋B2O3=2B＋3MgO,Na＋KCl=K↑＋NaCl等金属热还原反应在298 K时的标准摩尔吉布斯自由能变ΔrGøm、标准摩尔反应热ΔrHøm及标准摩尔熵变ΔrSøm,判断这些反应能否进行及焓变、熵变对反应的贡献。
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| 关 键 词： | 高考试题 铝热反应 金属热还原法 焓驱动 熵驱动 |
Is There Magnesium Thermal Reaction:Reflections on Chemistry Question in College Entrance Examination |
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| XING Tai-Yu,WAN Ru-Kai,YANG Jun-Jun.Is There Magnesium Thermal Reaction:Reflections on Chemistry Question in College Entrance Examination[J].Journal of Chemical Education,2020,41(7):92-95. |
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| Authors: | XING Tai-Yu WAN Ru-Kai YANG Jun-Jun |
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| Institution: | No.1 Senior High School of Yingcheng, Yingcheng 432400, China |
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| Abstract: | The standard molar free energy change, standard molar reaction heat and standard molar entropy change at 298 K of metallothermic reductions, such as 2 Al+Fe2O3=2 Fe+Al2O3, 3 Mg+B2O3=2 B+3 MgO and Na+KCl=K↑+NaCl, were calculated approximately, and to judge whether these reactions can take place and the contribution of enthalpy change and entropy change to the reactions. |
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| Keywords: | college entrance examination thermite reaction metallothermic reduction enthalpy-driven entropy-driven |
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