Self-diffusion of Aliphatic Alcohols
Self-diffusion of Aliphatic Alcohols
复制标题
脂肪醇的自扩散
作者：
J. Partington;R. F. Hudson;K. W. Bagnall
在一系列温度下测量了水和一些醇的自扩散系数，得到了实验活化能。每个醇的羟基中的氢原子与氘交换，然后通过燃烧到水中进行分析，然后使用微浮子装置测定密度1。采用烧结玻璃膜片扩散池进行磁搅拌，以测量速率。达到了0.3%左右的内部一致性，扩散系数D的总体精度约为0.5%。在甲醇的情况下，通过使用碳-14的替代程序确定扩散系数，并获得了两种方法之间的近似一致。
SELF-DIFFUSION coefficients for water and a number of alcohols have been measured at a series of temperatures, and experimental activation energies obtained. The hydrogen atom in the hydroxyl group of each alcohol was exchanged with deuterium, and the analyses performed by combustion to water followed by density determinations using a micro-float apparatus1. Sintered-glass diaphragm diffusion cells, stirred magnetically2, were used for the rate measurements. An internal agreement of the order of 0.3 per cent, with an overall accuracy in the diffusion coefficient D of about 0.5 per cent, was achieved. In the case of methyl alcohol, the diffusion coefficient was determined by an alternative procedure using carbon-14, and approximate agreement between the two methods was obtained.