CHEM101 Lecture Notes - Lecture 14: Arrhenius Equation, Rate Equation, Reaction Rate Constant
15 Mar 2016
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A + b _products elementary rate = k[a][b] When the irst step of a mechanism is rate-determining, the predicted rate law for the overall reacion is the rate law for that irst step. Though there must be suicient collision energy in order for a reacion to occur, there must also be the correct orientaion. The steric-factor is important in determining how fast a reacion is and it afects the value of the rate constant k. 1. can be used to calculate the value of ea. 2. can be used to calculate the rate constant at a given temperature if all else is known. Most reacions between stable molecules have acivaion energies of 100 kj/mol or greater, even when the overall reacion is exothermic. For example, a violent explosion occurs when a spark is applied to a mixture of. The spark gives some of the molecules enough energy to overcome the acivaion barrier.
