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为了解决化学教科书中用速度方程 V =k. Ca A.Cb B…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 Ca A. Cb B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。
In order to solve the chemical textbook with the velocity equation V = k. Ca A.Cb B ... derived reaction rate constant often due to different reaction series have different unit problems. According to the theory of collision and the theory of transition, the essence of the velocity constant k is the reaction rate in the standard concentration of thermodynamics, which can be expressed in the same unit (mol. L-1. S-1) as the reaction rate, on the basis of which the relative concentration (Actual concentration / normalized concentration) is used as the unit of Ca A. Cb B in the mass action law formula, the velocity constant k is expressed as the reaction rate when the relative concentrations of reactants are both 1, making the velocity constant k unaddressed Unit of constant.