甘氨酸+ H2O体系的热力学性质

IF 4.4 2区工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physical and Chemical Reference Data Pub Date : 2018-06-01 DOI:10.1063/1.5016677

D. Rowland

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引用次数: 7

摘要

描述甘氨酸+ H2O体系热力学性质的新方程是从先前发表的测量中得到的。测量值的温度范围为甘氨酸(aq)约273至473 K， α-甘氨酸(cr)约5至310 K。这项工作提供了以下性质的严格评估值:(1)α-甘氨酸(cr)在0至310 K范围内的热性质，(2)甘氨酸(aq)溶液的过量吉布斯能变化作为温度，压力和质量摩尔浓度的函数，有效范围为273至473 K，压力高达40 MPa，质量摩尔浓度范围为0至3.6 mol kg−1(或饱和极限)，以及(3)水溶液过程的标准状态性质。描述甘氨酸+ H2O体系热力学性质的新方程是从先前发表的测量中得到的。测量值的温度范围为甘氨酸(aq)约273至473 K， α-甘氨酸(cr)约5至310 K。这项工作提供了以下性质的严格评估值:(1)α-甘氨酸(cr)在0至310 K范围内的热性质，(2)甘氨酸(aq)溶液的过量吉布斯能变化作为温度，压力和质量摩尔浓度的函数，有效范围为273至473 K，压力高达40 MPa，质量摩尔浓度范围为0至3.6 mol kg−1(或饱和极限)，以及(3)水溶液过程的标准状态性质。

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Thermodynamic Properties of the Glycine + H2O System

New equations describing the thermodynamic properties of the glycine + H2O system are obtained from previously published measurements. The measured values span a range of temperatures of approximately 273 to 473 K for glycine(aq) and (5 to 310) K for α-glycine(cr). This work provides critically assessed values for the following properties: (1) thermal properties of α-glycine(cr) from 0 to 310 K, (2) the change in excess Gibbs energy for glycine(aq) solutions as a function of temperature, pressure, and molality, valid from 273 to 473 K, pressures up to 40 MPa, and the molality range of 0 to 3.6 mol kg−1 (or the saturation limit), and (3) standard-state properties for the aqueous solution process.New equations describing the thermodynamic properties of the glycine + H2O system are obtained from previously published measurements. The measured values span a range of temperatures of approximately 273 to 473 K for glycine(aq) and (5 to 310) K for α-glycine(cr). This work provides critically assessed values for the following properties: (1) thermal properties of α-glycine(cr) from 0 to 310 K, (2) the change in excess Gibbs energy for glycine(aq) solutions as a function of temperature, pressure, and molality, valid from 273 to 473 K, pressures up to 40 MPa, and the molality range of 0 to 3.6 mol kg−1 (or the saturation limit), and (3) standard-state properties for the aqueous solution process.

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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.