University Chemistry ›› 2020, Vol. 35 ›› Issue (9): 205-208.doi: 10.3866/PKU.DXHX201910055

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Discussion on the Calculation of Rate Constant and Activation Energy of Second-Order Reaction

Qibiao Li, Yajuan Hao()   

  • Received:2019-10-28 Accepted:2019-12-03 Published:2019-12-09
  • Contact: Yajuan Hao


In this paper, we discussed several problems on calculation of reaction rate constant in physical chemistry reference books. When calculating the rate constant k of the second-order reaction, we should make the half-life formula consistent with the reaction stoichiometric equation. And when calculating the activation energy with Arrhenius formula for ideal gas-phase reaction, attention should be paid to identifying the difference between the reaction rate constant kc and kp, as well as the difference between corresponding activation energy Eac and Eap. It is beneficial for students to have a correct understanding in calculation.

Key words: Reaction rate constant, Half-life, Gas-phase reaction, Activation energy