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利用沸石防溶液暴沸和制取明矾大晶体是中学化学实验的重要内容。开尔文公式是高等院校化学专业基础课中的重要知识点,如何使其在中学化学实验和生活中充分发挥理论指导作用,笔者谨就两例予以分析,并对其他实验与生活中的相关现象举一反三。一、溶液中加沸石防暴沸原理开尔文公式如(1)式所示:lnpr/p=2σM/RTrρ(1)式中p和pr分别表示平液面和弯曲液面的饱和蒸气压,σ,ρ和M分别表示溶液的表面张力、密度和
The use of zeolite anti-bumping bump and preparation of alum large crystals is an important part of high school chemistry experiments. The Kelvin formula is an important knowledge point in the basic course of chemistry major in colleges and universities. How to give full play to its theoretical guidance in chemistry experiment and life at middle school? I would like to analyze the two cases and compare the related phenomena in other experiments and life . First, the solution plus zeolite anti-bumping principle Kelvin formula as shown in equation (1): lnpr / p = 2σM / RTrρ (1) where p and pr represent the saturated vapor pressure of the flat surface and the curved surface, ρ and M represent the solution surface tension, density and