CHEMISTRY COMMUNITY

For 4D.9:


Why is the answer given as a positive instead of negative value? I thought that since the reaction is exothermic and the enthalpy of rxn is negative, the enthalpy density would also be negative?

I think enthalpy density is a value like regular density or volume, in which the value can't be negative.

I agree with Justin, I think that since you are dividing by a volume/density, which always has to be positive, you have to get a positive answer.