Question

When ammonium chloride is dissolved in water the solution becomes colder?

Answer 1

when ammonium chloride dissolves in water, the temperature falls because the ammonium chloride is pulling heat in from its surroundings (the water), causing thetemperature to fall. Thus, the energy change is endothermic.so when dissolved in water the solution becomes colder.

Answer 2

Explanation:

In an exothermic reaction, heat is given out of by the reactant molecules. Also, energy of reactants is more than the energy of products.

For example, $A + B \rightarrow CD + Heat$

In an endothermic reaction, heat is absorbed by the reactant molecules. Therefore, energy of reactants is less than the energy of products.

For example, $A + B + Heat \rightarrow CD$

Also, when ammonium chloride is dissolved in water the solution becomes colder because it is an endothermic reaction and heat is absorbed by the reactant molecules that is, ammonium chloride in this case.