10 g of ammonium nitrate are introduced into water at $25^\circ\text{C}$ and the mixture is stirred. The ammonium nitrate dissolves and, after one minute, the temperature of the solution falls to $10^\circ\text{C}$. Which word is used to describe this change?
- Aendothermic
- Bexothermic
- Cneutralisation
- Dreduction