Delta Hº versus delta H

[105169446]

In lecture, Prof Lavelle alternates between delta H and delta Hº. Is there a difference between the two? If there is, I which situation should I use which symbol?

[Bryant Vong 2G]

Delta H0 stands for the original delta H.

[404975170]

I believe they are the same.

[WilliamNguyen_4L]

Delta H is just the difference between the final and initial values of H. Delta Hº is the value of the difference between the final and initial values of H when the products and reactions are at standard conditions.

[Daisylookinland]

deltaH^0 refers to the standard reaction enthalpy (the rxn enthalpy when all R and P are in their standard state). DeltaH is the general symbol for the amount of heat absorbed or released. There is also deltaHf^0 which refers to the Standard Enthalpy of Formation (the standard rxn enthalpy for the formation of 1 mol of a substance).

[George Ghaly 2L]

They mean the same thing, one is just referring to the initial delta H.

[Kelsey Warren 1I]

Delta H naught is just delta H in standard/ideal conditions. You use them the same but one is for standard conditions.

[Megan_Ervin_1F]

Does this apply to all other variables as well?