enthalpy of formation

Moderators: Chem_Mod, Chem_Admin

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 ?

Goyama_2A
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.


Return to “Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)”

Who is online

Users browsing this forum: No registered users and 1 guest