Activation energy

[匿名]

2012-10-05 4:22 am

Statement:All particles in a sample reaction mixture have the same activation energy

Solution: Incorrect

My question:

I wonder why it is incorrect... My approach is that activation energy is so-called 'property/feature' of every specific reaction. In a specific reaction, there is a activation energy for it which is the minimum energy for the reaction to start. As it is a constant for a reaction , isn't that all the particles should have same activation energy?Though the particles have different ENERGY in a mixture according to the maxwell boltzmann distribution curve, they should share the same ACTIVATION ENERGY, shouldn't they.That's why I think this statement is correct....

Can someone explain this question to me. And do I have any misconception?

THankyou!!!

回答 (1)

Chem is try

2012-10-05 10:19 am

✔ 最佳答案

Activation energy means the minimum energy needed to triger the reaction.

Assumed that the reaction mixture may have those of
Ca CO3, HCl, CaCl2, H2O, CO2

The chemical equation:(reversible)
CaCO3 + 2HCl → CaCl2 + H2O + CO2

Forward reaction: Activation energy 1 (reactants --> products)
Backward reaction: Activation energy 2 (products --> reactants)
Activation E1 > Activation E2

Thus, the activation energy for all particles are different

參考: My chemical knowledge

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