A thorough search of the scientific literature under the auspices of the IUPAC Sub-Committee on Solubility and Equilibrium Data (SSED) has identified and compiled quantitative thermodynamic data for the first sulfate protonation step from about 270 papers, reports, books and electronic databases. A critical evaluation of these sources using well-defined criteria has rejected about half of them. The remaining (‘accepted’) data reveal that the standard state values of the first protonation constant of the sulfate ion, K1o\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$K_{1}^{\text{o}}$$\end{document}, corresponding to the equilibrium: SO42-(aq)+H+aq⇌HSO4-(aq)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{SO}_{4}^{2 - }} ({\text{aq}}) + {\text{ H}}^{ + } \left( {\text{aq}} \right) \rightleftharpoons {{\text{HSO}}_{4}^{ - }}({\text{aq}})$$\end{document} at infinite dilution, are known to good levels of accuracy up to ~ 250 °C. However, at higher temperatures, and at all temperatures in the presence of added electrolytes, the equilibrium constant values are much less certain. The corresponding values for the enthalpy (ΔrH1o\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Delta_{\text{r}} H_{1}^{\text{o}}$$\end{document}), entropy (ΔrS1o\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Delta_{\text{r}} S_{1}^{\text{o}}$$\end{document}) and isobaric heat capacity (ΔrCp,1o\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Delta_{\text{r}} C_{p,1}^{\text{o}}$$\end{document}) changes are also moderately well determined at near-ambient temperatures but are much more poorly defined both at higher temperatures and in the presence of even modest concentrations of added electrolytes. Comments on a number of aspects of the data and their evaluation are provided.

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关于硫酸根离子质子化热力学数据的评价

在 IUPAC 溶解度和平衡数据小组委员会 (SSED) 的主持下，对科学文献进行了彻底搜索，从大约 270 篇论文、报告、书籍和电子数据库中识别并汇编了第一个硫酸盐质子化步骤的定量热力学数据。使用明确定义的标准对这些来源进行批判性评估已拒绝了其中的一半。其余（“接受”）数据显示硫酸根离子的第一个质子化常数 K1o\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage 的标准状态值{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$K_{1}^{\text{o}}$$\结束{文档}，对应于均衡：SO42-(aq)+H+aq⇌HSO4-(aq)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage {mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{SO}_{4}^{2 - }} ({\text{aq}}) + {\text{ H}}^{ + } \left( {\text{aq}} \right) \rightleftharpoons {{\text{HSO}}_{4}^{ - }}({\text{aq} }})$$\end{document} 在无限稀释下，在高达 ~ 250 °C 的情况下具有良好的精度水平。然而，在更高的温度下，以及在添加电解质的所有温度下，平衡常数值的确定性要低得多。1o\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin} {-69pt} \begin{document}$$\Delta_{\text{r}} C_{p,1}^{\text{o}}$$\end{document}) 的变化也在近- 环境温度，但在较高温度和即使添加电解质浓度适中的情况下，其定义要差得多。提供了对数据的许多方面及其评估的评论。1}^{\text{o}}$$\end{document}) 的变化在接近环境温度下也可以很好地确定，但在更高的温度下和即使添加电解质浓度适中的情况下，变化的定义要差得多. 提供了对数据的许多方面及其评估的评论。1}^{\text{o}}$$\end{document}) 变化在接近环境温度下也可以很好地确定，但在较高温度下和即使添加电解质浓度适中的情况下，变化的定义要差得多. 提供了对数据的许多方面及其评估的评论。