Infrared (IR) thermography renders invisible infrared radiation with intuitive coloration in images and videos taken of objects, reactions, and processes. Educators can take advantage of this technology to extend students’ sensory perception of chemical reactions or processes that absorb or release heat in rich detail. In theory, IR thermography can be applied essentially universally for such analysis given that any change in thermal energy must result in, or from, the change of potential energy due to the interactions among atoms, molecules, and photons. Through the use of IR thermography, students can visualize otherwise invisible evidence of what is occurring on the molecular level in a variety of chemical process such as evaporative cooling, phase change, dissolution, titration, and enzymatic reactions. While not new, IR cameras are rapidly becoming affordable with models that connect easily with smartphones and tablets. The price decrease has opened the door for large-scale implementation in the chemistry education laboratory. We report here several laboratory activities and best practices that will facilitate the exploration of specific chemistry concepts through the use of infrared thermography, as well as integration of this technique into existing general chemistry laboratory courses.

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隐形斗篷和热反应：在化学教育实验室中应用红外热成像

红外（IR）热成像可以在物体，反应和过程的图像和视频中以直观的色彩呈现不可见的红外辐射。教育者可以利用这项技术来扩展学生对吸收或释放热量的化学反应或过程的感官知觉。从理论上讲，由于原子，分子和光子之间的相互作用，热能的任何变化都必须导致势能的变化或因势能的变化而发生，因此红外热成像基本上可以普遍用于此类分析。通过使用红外热成像技术，学生可以直观地看到在各种化学过程（例如蒸发冷却，相变，溶解，滴定和酶促反应）中分子水平上发生了什么的无形证据。虽然不是新事物，可以轻松连接智能手机和平板电脑的机型使IR摄像机迅速变得负担得起。价格下降为化学教育实验室的大规模实施打开了大门。我们在这里报告了一些实验室活动和最佳实践，这些活动和最佳实践将通过使用红外热成像以及将该技术集成到现有的常规化学实验室课程中来促进对特定化学概念的探索。