Enthalpy of formation

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Adrienne_4F
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Enthalpy of formation

Postby Adrienne_4F » Tue Feb 12, 2019 5:14 pm

What other molecules besides O2 and N2 have o enthalpy of formation?

Emmaraf 1K
Posts: 94
Joined: Sat Oct 20, 2018 12:16 am

Re: Enthalpy of formation

Postby Emmaraf 1K » Tue Feb 12, 2019 5:33 pm

Any element in its most stable state has an enthalpy of formation of 0. If you look at a periodic table which has states of matter labelled, the element in that state of matter has an enthalpy of formation of 0 except for diatomics which must have 2 atoms present at their most stable state of matter to be in their most stable state.

Henry Dudley 1G
Posts: 61
Joined: Fri Sep 28, 2018 12:16 am

Re: Enthalpy of formation

Postby Henry Dudley 1G » Sat Feb 16, 2019 8:36 pm

Just to add to the previous response, only elements, compounds, molecules, etc. that are not in their most stable states have enthalpies of formation that are not 0.


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