89.6 Rate Theories of elementary reaction 9.6.4 Calculation of k kscr=bt2 expl E.k=AeAP RT E rT+e rT The experimental activation energy (ea) depends on temperature Using e for substitution ofe BRT E E kSCr = TdABL exp k SCT=Ta AB /8RTepXP RT The pre-exponential factor corresponds to the collision frequency. This is the reason why a is also named as frequency factor      = − RT E k A a exp Ea = RT + Ec 2 1       = − RT E k BT c SCT exp 2 1 The experimental activation energy (Ea ) depends on temperature. Using Ea for substitution of Ec , 2 AB 8 exp c SCT RT E k d L RT     = −    2 AB 8 exp a SCT RTe E k d L RT     = −    The pre-exponential factor corresponds to the collision frequency. This is the reason why A is also named as frequency factor. 9.6.4 Calculation of k §9.6 Rate Theories of elementary reaction