89.5 Arrhenius equation 9.5.11 modification of Arrhenius equation 3参数拟合 The Arrhenius plots for some reactions are curved, which suggests that the activation energy of these reactions is a function of temperature. At this situation, the temperature dependence of k can be usually expressed as 2参数拟合 k=AT expl E RT 1.0 20 3.0 4.0 5.0 1000 / E k= Aexp Problem: RT Discussion the relationship dInkA between this equation and tB Deduce the relationship between ea and e vant' Hoff empirical equation9.5.11 modification of Arrhenius equation The Arrhenius plots for some reactions are curved, which suggests that the activation energy of these reactions is a function of temperature. At this situation, the temperature dependence of k can be usually expressed as:       = − RT E k AT m c exp 2 ln B d k A dT T = + Problem: Discussion the relationship between this equation and vant’ Hoff empirical equation Deduce the relationship between Ea and Ec . exp E c k A RT      = −          §9.5 Arrhenius equation