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中学物理教学大纲和初中物理课本(统编本)中,都要求开设研究萘的熔解过程的学生分组实验。一般学校实验室中也都配备有萘的熔解与凝固实验装置(以下简称原装置),但师生反映此实验装置的实验效果差,成功率低下。教材的理论难以在实验中得验证和重现,教师很感头痛。对此实验的改进势在必行,对此不少同行有过研究和尝试。笔者经过努力且和教师们一起试制、研究,并进行多次反复的实践,从实验室现有条件出发,设计了研究萘熔解过程的
Both the syllabus for middle school physics and the textbook for junior middle school physics (the codified edition) require students to set up experiments to study the melting process of naphthalene. Normal school laboratories are also equipped with naphthalene melting and solidification experimental device (hereinafter referred to as the original device), but teachers and students reflect the experimental device’s experimental results are poor, the success rate is low. The theory of textbooks is difficult to verify and reproduce in experiments. Teachers feel a headache. The improvement of this experiment is imperative, and many of the peers have studied and tried. After hard work and with the teachers, the author tried and studied, and carried out many repeated practices. Based on the existing conditions of the laboratory, the author designed the process of studying the fusion of naphthalene.