在初二的学生学习《汽化和液化》时,关于“油”和“水”的问题一直困扰着学生。下面作几点简单的思考。例1.冬天到了,我们都希望吃上热腾腾的火锅,你注意到了四川鸳鸯火锅是清汤那面先沸腾,还是有辣油那面先沸腾?分析“鸳鸯火锅”是用金属片将锅的内部空间隔成相等的两部分,主要成分以及初温几乎相同,但是清汤一侧液面没有油层,红汤一侧液面有一层麻辣风味的油,但我 As students in Grade Two study “Vaporization and Liquefaction,” questions about “oil” and “water” have plagued students. Here are some simple thoughts. Example 1. The winter is over, we all want to eat hot pot, you noticed that the Sichuan Yuanyang hot pot is the first boiling side of that soup, or there is hot side boiling first? Analysis “duck pot ” is a metal plate will pot Of the internal space separated by two equal parts, the main components and the initial temperature is almost the same, but the side of the broth without oil layer, the side of the red soup has a layer of spicy flavor of oil, but I