Thermodynamic Properties of Chlorine Dioxides and Chlorite Ions

IF 4.4 2区工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physical and Chemical Reference Data Pub Date : 2023-07-05 DOI:10.1063/5.0157581

G. Schmitz

引用次数: 0

Abstract

An analysis of experimental measurements of the properties of chlorine dioxide gives ΔfG°(OClO·, g) = 116.3 ± 2.0, ΔfH°(OClO·, g) = 98.5 ± 2.0 kJ mol−1, ΔfG°(ClOO·, g) = 112.5 ± 1.5, and ΔfH°(ClOO·, g) = 98.3 ± 1.5 kJ mol−1. An analysis of OClO· solubility measurements gives Ksol = 1.01 ± 0.15 mol l−1 atm−1, ΔsolH = −28.9 ± 1.5 kJ mol−1, and ΔsolS = −96.9 ± 4 J mol−1 K−1. The uncertainties provided in this paper are expanded uncertainties U or 2 σ (95% confidence internal). These results and the redox potential E°(OClO·, aq/ClO2−, aq) = 0.935 ± 0.02 V give ΔfG°(ClO2−, aq) = 26.1 ± 4.0 kJ mol−1, value significantly larger than the value in the NBS Tables of Chemical Thermodynamic Properties.

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二氧化氯和亚氯酸盐离子的热力学性质

二氧化氯性能的实验测量分析得出ΔfG°(OClO·，g) = 116.3±2.0，ΔfH°(OClO·，g) = 98.5±2.0 kJ mol - 1， ΔfG°(ClOO·，g) = 112.5±1.5，ΔfH°(ClOO·，g) = 98.3±1.5 kJ mol - 1。对OClO·溶解度测量的分析得出Ksol = 1.01±0.15 mol l−1 atm−1，ΔsolH =−28.9±1.5 kJ mol−1，ΔsolS =−96.9±4 J mol−1 K−1。本文给出的不确定性为扩展不确定性U或2 σ(95%置信度)。这些结果和氧化还原电位E°(OClO·，aq/ClO2−，aq) = 0.935±0.02 V得到ΔfG°(ClO2−，aq) = 26.1±4.0 kJ mol−1，显著大于NBS化学热力学性质表中的值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Physical and Chemical Reference Data 化学-化学综合

CiteScore

6.90

自引率

11.60%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Physical and Chemical Reference Data (JPCRD) is published by AIP Publishing for the U.S. Department of Commerce National Institute of Standards and Technology (NIST). The journal provides critically evaluated physical and chemical property data, fully documented as to the original sources and the criteria used for evaluation, preferably with uncertainty analysis. Critical reviews may also be included if they document a reference database, review the data situation in a field, review reference-quality measurement techniques, or review data evaluation methods.