摘要
"能量"是学生认识化学变化的重要维度,本实验借助手持红外热成像仪"看到"化学反应中的能量变化。在实验中通过拍摄等量的不同酸溶液与氢氧化钠溶液混合反应时的热成像图,从"温度"高低间接反映出热量变化,从宏观的能量变化建立模型,推理微观的成键、断键等过程,探究酸碱中和反应过程的放热以及弱酸电离过程的吸热,并培养学生的证据推理能力和科学探究意识。
"Energy"is an important dimension for students to understand chemical changes.This experiment used a handheld infrared thermal imaging camera to"see"the energy changes in chemical reactions.In the experiment,by taking the thermal imaging of the same amount of different acid solutions and sodium hydroxide solution when mixing and reacting,the heat change was indirectly reflected from the"temperature",the model was established from the macroscopic energy change,and the microscopic bond forming and bond breaking process was inferred.It explored the exothermic process of acid-base neutralization reaction and the endothermic process of weak acid ionization,and cultivated students’evidence reasoning ability and scientific inquiry consciousness.
作者
项佳敏
保志明
XIANG Jia-Min;BAO Zhi-Ming(High School Affiliated to Nanjing Normal University,Nanjing 210003,China)
出处
《化学教育（中英文）》
CAS
北大核心
2021年第21期86-89,共4页
Chinese Journal of Chemical Education
基金
全国教育科学规划课题(教育部重点)“培育创新后备人才的高中理科课程改革研究”(课题批准号∶DHA200377)
本实验获第七届江苏省中学化学创新实验展评一等奖。
关键词
能量
热成像仪
酸碱中和
弱酸电离
创新实验
energy
thermal imager
acid-base neutralization reaction
weak acid ionization
innovation experiment
