| 引用本文： |
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陈红玲,谢天俊,裴锐南,蔡华钧.引用相对浓度解决化学反应速度常数的不同单位问题[J].广西科学院学报,2002,(2):58-61. [点击复制]
- Chen Hongling,Xie Tianjun,Pei Ruinan,Cai Huajun.Solution of Different Units of Rate Constant in Chemical Reactions by Relative Concentration[J].Journal of Guangxi Academy of Sciences,2002,(2):58-61. [点击复制]
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| 摘要: |
| 为了解决化学教科书中用速度方程V=k·CAa·CBb…导出的反应速度常数常因反应级数不同而有不同的单位问题。根据碰撞理论和过渡理论的观点,速度常数k的本质是热力学标准态浓度条件下的反应速度,与反应速度可用相同单位(mol·L-1·s-1),在此基础上引进相对浓度(实际浓度/标准态浓度)作质量作用定律公式中CAa·CBb的单位,把速度常数k表述为当反应物相对浓度均为1时的反应速度,可使速度常数k变为不带单位的常数。 |
| 关键词: 化学反应 速度常数 反应速度 单位 |
| DOI： |
| 投稿时间：2002-03-18 |
| 基金项目: |
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| Solution of Different Units of Rate Constant in Chemical Reactions by Relative Concentration |
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Chen Hongling, Xie Tianjun, Pei Ruinan, Cai Huajun
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| (Chemistry and Chemical Enginnering College, Guangxi Univ., Nanning, 530004) |
| Abstract: |
| In chemical textbooks, the rate constant educed from the rate equation V=k·CAa·CBb… normally has different units in terms of the orders of reactions.According to effective collision and transition state theory, the rate constant k is regarded as the reaction rate under thermodynamic normal concentrations,and the k may have the same unit as reaction rate. In this point, the relative concentration (true concentration/standard state concentration) can be used as unit of CAa·CBb of the mass action law formula. The rate constant can be expressed as the reaction rate when the reactant relative concentrations are all one, and has no relation to unit |
| Key words: chemical reaction rate constant reaction rate unit |
