g some salts are soluble in water even though the overall process is endothermic and the solution becomes colder during dissolution. Why does this happen

See explanation

Explanation:

We must recall that a process is spontaneous when the change in free energy is negative.

Hence;

∆G= ∆H - T∆S is expected to give us a negative value.

However, even when the overall dissolution process is endothermic, the positive change in entropy due to increase in the number of particles in solution leads to a negative value of free energy thereby making the process spontaneous.

Therefore, some salts are soluble in water even though the overall process is endothermic and the solution becomes colder during dissolution due to increase in entropy.