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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: CelticKhemist2000 on December 04, 2020, 05:35:40 PM

Title: Heat of formation.
Post by: CelticKhemist2000 on December 04, 2020, 05:35:40 PM

I've been trying to find what the circle with a line through it means? What does that symbol represent? What is it called?

Update: I already found the answer to my question but I can't figure out how to delete the post.

Title: Re: Heat of formation.
Post by: Corribus on December 04, 2020, 05:53:51 PM

No need to delete or edit your post. Why don't you add what you found, to help future people who may have the same question?

Title: Re: Heat of formation.
Post by: CelticKhemist2000 on December 05, 2020, 11:54:37 PM

Good point. I found that it's called a "superscript" and it indicates that the ΔH is happening under standard conditions. ΔH by itself indicates the change in enthalpy has happened under non standard conditions. Also, ΔH° and subscript C indicates a combustion reaction with oxygen, and stands for "combustion".