盐湖溶液热化学(Ⅳ) Li_2B_4O_7—Li_2SO_4—LiCl—H_2O体系298.15K时稀释热、热容和表观摩尔热焓的研究

Thermochemistry of Solution of Salt Lakes (Ⅳ)—Heats of Dilution, Heat Capacities and Apparent Molal Enthalpies of Li_2B_4O_7—Li_2SO_4—LiCl—H_2O System at 298.15K

用连续滴定量热法测定了四元体系Li_2B_4O_7—Li_2SO_4—LiCl—H_2O及其次级体系Li_2B_4O_7—Li_2SO_4—H_2O和Li_2B_4O_7—LiCl—H_2O 298.15K时的稀释热,并结合Debye-Hückel热焓极限公式研究了该体系的平均表观摩尔热焓。

The heats of dilution and heat capacities of eutonic point solution system Li_2B_4O_7—Li_2SO_4—LiCl—H_2O and subsystems Li_2B_4O_7—Li_2SO_4—H_2O and Li_2B_4O_7—LiCl—H_2O were measured to cover ionic strength range from 19 to 0. 1 at 298. 15K. The data of the heat of dilution were extrapolated to infinte dilution by use of the Debye-Htickel liminting law to obtain relative apparent molal enthalpies.