Ultrasonic Relaxation Studies in Aqueous Solutions of 2–2 Electrolytes
Ultrasonic Relaxation Studies in Aqueous Solutions of 2–2 Electrolytes
复制标题
2-2 种电解质水溶液中的超声弛豫研究
DOI：
10.1063/1.1673426
复制
发表时间：
1970
影响因子：
4.4
通讯作者：
K. Tamm
中科院分区：
文献类型：
--
作者：
A. Bechtler;K. Breitschwerdt;K. Tamm
在5 ~ 50 ℃的温度下，在105-109 Hz的频率范围内测量了包括二价过渡金属离子硫酸盐在内的多种2-2电解质水溶液的超声吸收。一般来说，如果适当考虑电解质溶液的结构吸收，在这个频率范围内可以分离出三个弛豫。每个波长的弛豫时间和相应的最大吸收被分配到三步缔合或解离机制的法向坐标。为了适用于新的实验结果，现有的逐步缔合理论必须扩展到更一般的形式。通过适当的变换，可以用各个反应步骤的动力学和热力学参数来表示法向坐标。的速率常数，平衡常数，反应体积，和活化能的基础上计算的扩展理论的值被提出为各个反应步骤。
The ultrasonic absorption in aqueous solutions of a number of 2–2 electrolytes including the sulfates of the bivalent transition metal ions has been measured in the frequency range 105–109 Hz at temperatures between 5 and 50°C. Generally, three relaxations can be separated in this frequency range if the structural absorption of the electrolytic solution is properly taken into account. Relaxation times and corresponding maximum absorption per wavelength are allocated to the normal coordinates of a three‐step association or dissociation mechanism. In order to be applicable to the new experimental results, the existing theory of the stepwise association had to be extended to a more general form. By means of suitable transformations the normal coordinates can then be expressed in terms of kinetic and thermodynamic parameters of the individual reaction steps. Values of the rate constants, equilibrium constants, reaction volumes, and activation energies calculated on the basis of the extended theory are presented for the individual reaction steps.