5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

Question

1. exothermic
2. activated
3. endothermic
4. a decomposition

Answer 1

Hi Sarah,

When ammonium chloride dissolves in water, the temperature falls because the ammonium chloride is pulling heat in from its surroundings (the water), causing the temperature to fall. Thus, the energy change is endothermic.