DISSOLUTION OF AMMONIUM CHLORIDE IN WATER IS EXOTHERMIC OR ENDOTHERMIC
Dissolution of Ammonium Chloride in Water is Exothermic
The dissolution of ammonium chloride in water is exothermic. This means that the reaction produces heat, which can be observed by placing some ice cubes on your finger and touching them to the solution. As you may have noticed, this causes them to melt much faster than normal!
The reaction between NH4Cl and H2O is endothermic because the product formed (NH4OH) has a higher bond energy than either reactant (NH4+ + Cl-).
Dissolution of Ammonium Chloride in Water is Endothermic
Ammonium chloride is a salt. Salts dissolve in water to form ions, which are free to move around the solution as they please. Ionic bonds are formed between these ions when they’re of opposite charge, and these bonds are strong enough to hold them together even at room temperature.
- In general, an endothermic reaction is one that absorbs heat from its surroundings. And an exothermic reaction releases heat into its surroundings.
- When a substance dissolves in water, it breaks apart into ions (positively charged atoms) and electrons (negatively charged atoms). This process requires energy because it involves breaking bonds between atoms and rearranging their electrons to form new bonds with the surrounding water molecules. This is why saltwater feels warm when you dip your hands into it: It takes more energy to dissolve salt than plain water does, so when you add salt to your bathtub or swimming pool, you’re adding some extra warmth!
The dissolution of ammonium chloride in water is exothermic and endothermic.