Thanks for hint, Borek! so activation enthalpy is another word for activation energy, isn't it? could it be that the quantity which is asked for can be calculated by arrhenius equation? I must confess that I didn't have calculate an activation energy so far. :colondollar:

Reply 5

Borek

Original post by Kallisto

Thanks for hint, Borek! so activation enthalpy is another word for activation energy, isn't it?

That's my understanding.

could it be that the quantity which is asked for can be calculated by arrhenius equation?

Most likely.

Reply 6

Kallisto

Entertainment Forum Helper

Original post by Borek

That's my understanding.

Never heard this alternative word before. I have learnt something new again. :biggrin:

Original post by Borek

Most likely.

If that is the case, there must be concrete numeric values to solve the activation energy. As far as I can see a logarithmic function for activation energy is required.

(edited 10 years ago)

Reply 7

username913907

Original post by Kallisto

Never heard this alternative word before. I have learnt something new again. :biggrin:

If that is the case, there must be concrete numeric values to solve the activation energy. As far as I can see a logarithmic function for activation energy is required.

Original post by Borek

That's my understanding.

Most likely.

Well just depends on how you define it. Enthalpy is enthalpy, energy is typically gibbs free energy. So they are different.

You are probably more likely to find the activation ENERGY as if i remember correctly from my phy chem lectures last year it can be determined from the changes in the activation volume. You're never going to find this on the 'normal internet'. It will be in highly specialised journals for very specific systems. Even then you'll need to understand all the stat mech that goes with it to be able to use it.