Apparent molar heat capacities of aqueous solutions of LiBO2, NaBO2, KBO2, Na2B4O7 and K2B4O7 at T = (298.12, 313.13 and 328.14) K using a Picker flow calorimeter

被引：2

作者：

Gui, Lingyan ^{[1
]}

Li, Dongdong ^{[2
]}

Wu, Jiangtao ^{[1
]}

Meng, Xianyang ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Key Lab Thermo Fluid Sci & Engn, Minist Educ, Xian 710049, Peoples R China

[2] Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Qinghai, Peoples R China

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2022年 / 175卷

基金：

中国国家自然科学基金;

关键词：

Apparent molar heat capacity; Lithium metaborate; Sodium metaborate; Potassium metaborate; Sodium tetraborate; Potassium tetraborate; THERMODYNAMIC PROPERTIES; SODIUM-CHLORIDE; HIGH-PRESSURES; NACL; WATER; TEMPERATURES; CALIBRATION; PREDICTION; STANDARD; LIQUIDS;

D O I：

10.1016/j.jct.2022.106879

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The apparent molar heat capacities of LiBO2(aq), NaBO2(aq), KBO2(aq), Na2B4O7(aq) and K2B4O7(aq) solutions at molalities from 0.01 to 2.6 mol.kg(-1), and at temperatures T = (298.12, 313.13 and 328.14) K have been determined using a Picker flow calorimeter built in this work. Further, the standard heat capacities of these solutes were derived from the experimental data by extrapolation to infinite dilution using the Pitzer ion -interaction model. The group contribution method is used to calculate the standard molar heat capacities of tetraborate ion in three equilibria for different assumptions, among which the prediction on the assumption that the standard molar heat capacity of reaction for the association reaction is zero is the most reasonable, and the results are in good agreement with the experimental data.

引用

页数：12

共 29 条

[1] HEAT-CAPACITIES OF AQUEOUS HCL, NAOH, AND NACL AT 283.15, 298.15 AND 313.15 K - DELTA-C-DEGREES-P FOR IONIZATION OF WATER [J].