摘要
指出传统的"分子极性演示实验"的不严谨之处,从理论层面解释了用带电玻璃棒(或塑料棒)靠近四氯化碳等非极性分子时液流也能发生偏转的原因。运用微波对极性分子和非极性分子的影响不同的原理,设计了2种改进的实验方案,利用微波炉加热不同液体,借助温度计或测温贴纸测量液体的温度变化,可以明显地发现极性分子受微波加热升温显著,从而区分极性分子和非极性分子。
This paper points out the impreciseness of the traditional "molecular polarity demonstration experiment", and explains theoretically why the flow of fluid can also deflect when a charged glass or plastic rod is placed near tetrachloromethane. Using microwaves to affect polar and nonpolar molecules in different ways, two improved experimental schemes are designed. Heats different liquids in a microwave oven, uses a thermometer or temperature paper to measure the temperature change of a liquid, it is obvious that polar molecules are heated up significantly by microwave heating and so as to distinguish polar and nonpolar molecules.
作者
王新福
WANG Xin-Fu(Xishan Senior High School,Wuxi 214174,China)
出处
《化学教育（中英文）》
CAS
北大核心
2021年第1期88-92,共5页
Chinese Journal of Chemical Education
基金
无锡市教育科学“十三五”规划课题“基于核心素养的高中化学实验校本化开发与研究”(编号:D/D/2018/003)。
关键词
分子极性
极化
微波
电磁辐射
测温贴纸
molecular polarity
polarization
microwaves
electromagnetic radiation
temperature paper
