Cold packs, whose temperatures are lowered when ammonium nitrate dissolves in water, are carried by athletic trainers when transporting ice is not possible. Which of the following is true of this reaction?
Group of answer choices
ΔH = 0, since cold packs are sealed
ΔH > 0, process is endothermic
ΔH > 0, process is exothermic
ΔH < 0, process is exothermic
ΔH < 0, process is endothermic
