The activation energy for a simple chemical reaction
A → Bis Eₐ in forward direction. The activation energy for
reverse reaction
(a) is always double of Eₐ
(b) is negative of Eₐ
(c) is always less than Eₐ
(d) can be less than or more than Eₐ
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Answer:
(d) can be less than or more than Ea
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It can be both more or less than the Ea.
Explanation:
- Activation energy or Ea is the energy that is needed to be supplied to the reactant to perform a reaction and get the product.
- This is the threshold energy that is needed to be supplied from outside.
- Now the activation energy can be defined from the energy vs product graph where the energy between the maximum energy state of the reaction and the energy of the reactant is the the activation energy.
- So in case of the reverse reaction, the product is the reactant and vice versa.
- Now in case of the endothermic reaction the energy of the product is more than that of the reactant.
- In case of the exothermic reaction, the energy of the product is less than that of the reactant.
- So accordingly, the reverse reaction will also vary and activation energy will also vary.
For more information about activation energy,
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A reaction takes place in 3 steps with activation energy e1=180kj/mol e2=80kj/mol and e3=50kj/mol respectively.Overall rate constant of the reaction is k= [k1*k2/k3]^2/3 the activation energy of the reaction will be?
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What is activation energy? How is the rate constant of reaction related to its activation energy?
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