利用红外热成像技术测定化学反应热量变化——以氢氧化钡与氯化铵反应为例

Determining Change in Heat of Chemical Reaction Using Infrared Thermal Imaging Technology:Taking Reaction of Barium Hydroxide and Ammonium Chloride as Example

化学反应的热效应在中学化学教学及实际生产中有着非常重要的意义。针对教材利用触觉定性感知热量变化时存在个体差异大等问题,以红外热成像技术为实验手段,对氢氧化钡与氯化铵反应进行监测,发现八水合氢氧化钡与氯化铵、氢氧化钡与氯化铵反应,分别呈现吸热和放热现象。借助红外热成像技术辅助观察氢氧化钡与氯化铵反应,可将化学反应的热效应数据化和可视化,加强学生对反应热的多角度认识和深入理解。

The thermal effect of chemical reaction is very important in middle school chemistry teaching and actual production.Aiming at the shortcomings of large individual differences when the textbook uses tactile qualitative perception of heat changes,infrared thermal imaging technology is used as an experimental method to monitor the reaction of barium hydroxide and ammonium chloride.It is found that the reaction of barium hydroxide octahydrate and ammonium chloride,and the reaction of barium hydroxideand ammonium chloride,showing endothermic and exothermic phenomena respectively.With the aid of infrared thermal imaging technology to assist in observing the reaction of barium hydroxide and ammonium chloride,the thermal effects of chemical reactions can be digitized and visualized,and students’multi-angle understanding and in-depth understanding of reaction heat can be strengthened.