Differences in the delta Hs

[Tasnia Haider 1E]

What is the difference between a delta H with a subscript of c and a delta H with a subscript of h? The delta h had a subscript of c in the homework problem in 8.57?

[404995677]

I believe that delta H subscript c is the Standard enthalpy change of combustion or the change in enthalpy per mole of a substance that is burned in a combustion reaction under standard conditions. I dont know about the subscript h. I found this on page 291 of the textbook.

[Julianna Thrasher 1B]

h is used in chemistry to symbolize enthalpy so I do not think you can have a delta H with a subscript of h because delta H is the change in enthalpy so h can not be enthalpy as well. Delta H can have subscripts of final, initial, products, reactants, vapor, fusion, sublimation, solid, liquid, etc.