enthalpy of formation

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Savannah Mance 4G
Posts: 107
Joined: Fri Aug 30, 2019 12:17 am

enthalpy of formation

Postby Savannah Mance 4G » Wed Feb 05, 2020 8:34 pm

Is the enthalpy of formation of all diatomic molecules 0 ?

Posts: 107
Joined: Sat Aug 24, 2019 12:17 am

Re: enthalpy of formation

Postby Goyama_2A » Wed Feb 05, 2020 8:41 pm

I believe so.
This is the case for most because no change is occurring in the reaction:
ie. O2–>O2
However, if you were to calculate the enthalpy change in a reaction such as:
2O—> O2
You would be calculating the heat of atomization(which is the heat released when the O2 bond is formed)

Daria Azizad 1K
Posts: 116
Joined: Thu Jul 25, 2019 12:15 am

Re: enthalpy of formation

Postby Daria Azizad 1K » Wed Feb 05, 2020 9:03 pm

Yes because all atoms that form diatomic molecules are in those molecules under standard conditions.

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