In the equation Rate = ZAB.e-Ea/RT, what does ZAB mean?

Based on collision theory, the rate of a chemical reaction can be given as ZAB.e-Ea/RT.

ZAB represents the collision frequency of reactants, A and B

  • Reactions occur when two reactant molecules effectively collide, each having minimum energy and correct orientation.
  • In the reaction A + B → ABThe rate of the reaction is equal to the number of active collisions. So the rate of reaction can be written as

    ZAB e-Ea/RT

    Ea: is the activation energy (J/mol)

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