The rate constant (k) is the temperature-dependent proportionality constant that appears in the rate law, linking the reaction rate to the reactant concentrations. Its value is characteristic of a particular reaction at a given temperature. According to the Arrhenius equation, the rate constant increases as the temperature rises.

速率常数(k)是出现在速率定律中、与温度有关的比例常数,它把反应速率与反应物浓度相联系。其数值对于给定温度下的某一特定反应是特征性的。根据阿伦尼乌斯方程,速率常数随温度升高而增大。