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初中物理课本第一册(人教版)第46页介绍的做碘的升华和凝华实验(见图1),有三个缺点:1.实验操作不安全;2.药品不便于回收;3.清洗器材不方便。为此,笔者将实验方法改进如下:
There are three disadvantages to doing iodine sublimation and desublimation experiments (see Figure 1): 1. The experimental operation is not safe; 2. The medicine is not convenient for recovery; Cleaning equipment is not convenient. To this end, the author will improve the experimental method is as follows: