基于热成像仪从能量视角辨观化学反应

Discerning Chemical Reactions from Energy Perspective Based on Thermal Imaging Cameras

"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.