有镁热反应吗——由一道高考化学题引起的思考  

Is There Magnesium Thermal Reaction:Reflections on Chemistry Question in College Entrance Examination

作　　者：邢泰宇 万如锴 杨军军 XING Tai-Yu;WAN Ru-Kai;YANG Jun-Jun(No.1Senior High School of Yingcheng,Yingcheng 432400,China)

机构地区：[1]湖北省应城市第一高级中学,湖北应城432400

出　　处：《化学教育（中英文）》2020年第7期92-95,共4页Chinese Journal of Chemical Education

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ΔrG^■m、标准摩尔反应热ΔrH^■m及标准摩尔熵变ΔrS^■m,判断这些反应能否进行及焓变、熵变对反应的贡献。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.

关 键 词：高考试题 铝热反应 金属热还原法 焓驱动 熵驱动 

分 类 号：G633.8[文化科学—教育学]