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Subject - Chemistry:

Basics

MCQ - 164-2350

Question:

For endothermic reaction where ∆H represents the enthalpy of the reaction is KJ mol-1, the minimum value for the energy of activation will be A.

  1. ∆H
  2. Zero
  3. >∆H
  4. Zero

Correct Answer: C

Explanation:

For endothermic reaction theenergy of activation for forward step is greater than that of backward step, the magnitude of ∆H is the difference of these two energies of activation, Ea1>Ea2so,∆ H=Ea2-Ea1 or ∆ E>∆H

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