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AP EAMCET2011ChemistryThermodynamics (C)

Which one of the following is true for an exothermic reaction A B , if E_f and E_b are the activation energies of forward and backward reactions respectively?

Options

  1. AE_f>E_b
  2. BE_f=E_b
  3. CE_f=-E_b
  4. DE_f < E_b

Correct answer

D. E_f < E_b

Step-by-step solution

Activation energy for the forward reaction, E_f and the activation energy for the backward reaction, E_b are related to the enthalpy of the reaction by the equation. _r H=E_f-E_b For exothermic reaction aligned _r H & E_f aligned

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