Answer:
For a given process at constant pressure, ∆H is negative. This means that the process is C) exothermic.
∆H is the change in enthalpy within a system. Enthalpy is the sum of the internal energy within that system.
H = E + PV = Change in internal energy + Pressure * Volume
In endothermic processes, the amount of energy within the system increases and therefore ∆H increases. In exothermic processes, the amount of energy within the system decreases and therefore ∆H decreases. The best way to remember this is exo is energy exiting the system.
