Question

Does a negative `DeltaH` correspond to an endothermic or exothermic process?

Answer 1

-`ΔH` corresponds to a release of energy from the system into the universe, this is termed an exothermic process

Explanation:

When the value of `ΔH` is negative, the system has released energy into the universe. The system would be a exothermic one.

Consider the graphic below:

As side note, you should consider that the formation of bonds are what result in a net release of energy from the system, and that bond formation is completely driven by the electronic properties of the species.