碘的升华和凝华实验改进江苏省太仓职业高级中学周丽芬在做碘的升华和凝华实验时，如果按课本上的做法往往会出现以下两种情况：１．由于用酒精灯加热，极容易超过碘的熔点（１１４Ｃ）而使碘熔化，导致升华现象实验的失败．２．用酒精灯加热，不便在课堂上走动操作演示，... Sublimation of Iodine and Improvement of Sublimation Experiments During the sublimation and desublimation experiments conducted by Taicang Vocational Senior High School Zhou Lifen in Jiangsu Province, the following two situations often occur when textbooks are used. Because of heating with an alcohol lamp, it is extremely easy to exceed the melting point of iodine (114C) to melt the iodine, leading to the failure of sublimation experiments. 2. Heating with alcohol lamp, inconvenient to move around the classroom to demonstrate, ...