|
|||||
|
|
| 标准氢电极反应绝对熵变的测定 | |
| 引用本文： | 郭琳,方正,罗远辉.标准氢电极反应绝对熵变的测定[J].有色金属(冶炼部分),2003(3):17-19,26. |
| 作者姓名： | 郭琳 方正 罗远辉 |
| 作者单位： | 1. 广东教育学院化学系,广州,510303 2. 中南大学化学系,长沙,410083 3. 北京有色金属研究总院,北京,100088 |
| 基金项目： | 国家自然科学基金项目 (NO .5 97740 2 8) |
| 摘 要： | 建立了以热电偶为测温元件的热电化学测试系统 ,用恒电流极化的方法测定了Fe(CN) 3 -6/Fe(CN) 4 -6、H2 SO4(H+ /H2 )、CuSO4(Cu2 + /Cu)等 3个体系的电极反应的表观摩尔焓变 (ΔrHm) ,结果表明 :各电极反应的表观摩尔焓变与电解质溶液的浓度成直线关系 ,并且可以得到在室温下标准氢电极反应的绝对熵变ΔrS H+ /H2 为 85 2J/ (K·mol)。 |
| 关 键 词： | 热电化学 热电偶 绝对熵变 |
| 文章编号： | 1007-7545(2003)03-0017-03 |
Determination of the Absolute Entropy Change of the Standard Hydrogen Electrode |
|
| GUO Lin,FAN Zhen,LUO Yuan-hui.Determination of the Absolute Entropy Change of the Standard Hydrogen Electrode[J].Nonferrous Metals(Extractive Metallurgy),2003(3):17-19,26. | |
| Authors: | GUO Lin FAN Zhen LUO Yuan-hui |
| Affiliation: | GUO Lin 1,FAN Zhen 2,LUO Yuan-hui 3 |
| Abstract: | A system of thermo-electro-chemical measurement has been established using thermoelectric coupling as the thermometric component. Under the condition of constant-current polarization, it has been used to determine the molar enthalpy change of electrode reaction under different concentration for different electrode processes of the following three systems: Fe(CN) 3- 6/Fe(CN) 4- 6?H 2SO 4(H +/H 2)?CuSO 4(Cu 2+/Cu). The results indicate that the molar enthalpy change of different electrode processes is linear with the electrolytic concentrations. The absolute entropy change of the standard hydrogen electrode reaction was determined to be 85.2 J/(K·mol) at room temperature . |
| Keywords: | Thermo-electro-chemistry Thermo-electric couple Absolute entropy |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《有色金属(冶炼部分)》浏览原始摘要信息 | |
| 点击此处可从《有色金属(冶炼部分)》下载全文 | |