Concentration and temperature dependence of the activation energy of self-diffusion in aqueous electrolyte solutions

1972 ◽  
Vol 5 (3) ◽  
pp. 270-272 ◽  
Author(s):  
A. I. Toryanik ◽  
V. V. Kisel'nik
Keyword(s):  
Activation Energy ◽  
Temperature Dependence ◽  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Aqueous Electrolyte Solutions ◽  
Self Diffusion

Ionic Self-Diffusion in Concentrated Aqueous Electrolyte Solutions

2002 ◽  
Vol 88 (9) ◽  
Author(s):  
J.-F. Dufrêche ◽  
O. Bernard ◽  
P. Turq ◽  
A. Mukherjee ◽  
B. Bagchi
Keyword(s):  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Aqueous Electrolyte Solutions ◽  
Self Diffusion

The Temperature Dependence of the Electrical Conductivity Activation Energy of the of Aqueous Electrolyte Solutions

2021 ◽  
Vol 1031 ◽  
pp. 228-233
Author(s):  
Yuliya M. Artemkina ◽  
Vladimir V. Shcherbakov ◽  
Irina A. Akimova
Keyword(s):  
Activation Energy ◽  
Aqueous Solution ◽  
Temperature Dependence ◽  
Aqueous Electrolyte ◽  
Electrolyte Solutions ◽  
Temperature Step ◽  
Conductivity Activation Energy ◽  
Intermolecular Hydrogen Bonds ◽  
Optimal Value ◽  
Increasing Temperature

The procedure for determining the activation energy of conductivity Еκ is analyzed depending on the temperature step ΔT. It is shown that with increasing ΔT, the error in the calculation of Eκ decreases, but the calculated value of Eκ decreases. In order not to lose the temperature dependence of the activation energy, it is necessary to choose the optimal value of Δt. In our opinion, this value should not exceed 5 – 10 °C. Taking into account the decrease in concentration with increasing temperature due to a decrease in density has virtually no effect on the accuracy of determining Eκ, provided that ΔT is 5 – 10 °C. It has been shown that in the temperature range 20 – 80 °C, the activation energy of conductivity decreases with increasing temperature. This decrease is due to the rupture of intermolecular hydrogen bonds of the solvent with increasing temperature. It was suggested that the movement of ions in an aqueous solution may be accompanied by the breaking of hydrogen bond of the solvent.

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