A sample of 10 g of ammonium nitrate is put into water at $25\degree\text{C}$, and the mixture is stirred. The ammonium nitrate dissolves, and after one minute the temperature of the solution becomes $10\degree\text{C}$. Which word describes this change?
- Aendothermic
- Bexothermic
- Cneutralisation
- Dreduction