SAT2化学专题复习Graham's Law of Diffusion and Effusion
我们来看SAT2化学专题复习Graham's Law of Diffusion and Effusion。选择考SAT2化学的学生比较少，因为传说中化学容错率很小，大概只有三四个。而且有很多专业词汇要去记忆，很头疼。但是其实SAT2化学还是比较不错的。只要学完了高中前两本必修教材，化学的问题都不会太大。
Graham's law states that the rates of effusion of two gases are inversely proportional to the square roots of their molar masses at the same temperature and pressure:
Effusion is the term used to describe the passage of a gas through a tiny orifice into an evacuated chamber, as shown in the figure below.
The rate of effusion measures the speed at which the gas travels through the tiny hole into a vacuum. Another term to remember for the test is diffusion. Diffusion is the term used to describe the spread of a gas throughout a space or throughout a second substance.
关于SAT2化学复习我还想和大家分享一点我的经验，我只用了一本barron，知识点给的很全了，也是和中国教材同时使用，效果会非常不错。至于所谓的单词，看一看词根词缀习惯了就好了。