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1.有关原子-分子论的演示实验普通化学课堂实验,波洛西恩著,高等教育出版社出版,第11页—17页。 (l)溴蒸气在空气和氢气中的扩散因为液态溴(沸点59℃)容易挥发,发出棕色的蒸气,所以能利用来说明气体的扩散。把溴置于不同密度的介质中(空气和氢气),能观察到溴蒸气的不同的扩散速度。 (2)氢气经过多孔筒的扩散这个实验能清楚地表明:气体系由经常处于运动状态的分子所组成,分子的运动速度随气体的种类而异,所取的气体密度愈小,运动速度愈大, (3)溶液中的扩散液体中分子运动的证据:把
1. Atomic - molecular demonstration experiment General chemistry classroom experiment, Pollocks, Higher Education Press, p. 11 -17 pages. (l) Diffusion of Bromine Vapor in Air and Hydrogen As the liquid bromine (boiling point of 59 ° C) is volatile and emits a brown vapor, it can be used to explain the gas diffusion. Bromine is placed in media of different densities (air and hydrogen) and different rates of diffusion of bromine vapor are observed. (2) hydrogen diffusion through the porous tube This experiment can clearly show that: the gas system is often composed of molecules in motion, the molecular velocity varies with the type of gas, the smaller the gas density, the more speed Large, (3) Evidence of molecular motion in diffusive liquids in solution: Put