Units

[Arshiya]

I understand how to do the problems in order to get the enthalpy of a reaction. However, I am confused when the units should be J/mol or just J when calculating enthalpy.

[GavinAleshire1L]

I think when the problem is only concerned with the enthalpy of the reaction it can be either J or J/mol, however when it specifically asks for energy per mol that is when you'd have to take it into account. It's helpful to make sure to keep track of all units and cancel them out accordingly when solving.

[Phan Tran 1K]

Some problems will give you the amount of a substance and ask how much heat it gives off, and this is when J/mol comes into play. Other than that I don't think it matters if they're just asking for enthalpy.