ErCl_3在DMF中活度系数的测定及热力学性质的研究

Study on Activity Coefficient and Thermodynamics Determining of ErCl_3 in DMF

应用电导法在293K-313K温度范围内测定了ErCl3在DMF溶剂中的电导率,利用Debye-Hücker和Osager-Falkenhangen公式计算了ErCl3在DMF溶剂中的平均活度系数γ±,讨论了温度和浓度对活度系数的影响:其活度系数随溶液浓度的增加而降低,随实验温度的升高而降低.计算了ErCl3在DMF溶剂中的相对偏摩尔自由能(-CB,R)、相对偏摩尔焓(-HB,R)、相对偏摩尔熵(-SB,R),并对其相对偏摩尔性质的某些变化规律作了初步的讨论.

Conductivity of ErCl3 in DMF was determined with conductivity method at a temperature range from 293K to 313K. The mean activity coefficient of ErCl3 in DMF was calculated with Debye- Hücker and Osager- Falkenlagen formula, and effect of the temperature and the concentration to the mean activity coefficient have been discussed. The relative partial molar free energies （-↑CB,R）, enthalpies （-↑HB,R） and entropies （-↑SB,R） of ErCl3 in DMF at above experimental temperatures have been calculated. The behaviors of change of relative partial molar quantities were discussed on the bases of electrolytic solution theory.