Question

Does dissolution of nacl increase temperature of water

Answer 1

No. Dissolution of NaCl in water lowers the temperature of water. This is the reason for using NaCl for making Ice Creams.

Note:
Salt also increases the boiling point of water. salt, which elevates the boiling temperature of water in a process known as boiling point elevation. Basically, water is known as a solvent and salt is known as a non-volatile solute. When you add something like salt to a solvent like water, it makes water become an impure solvent and raises its boiling point above that of pure solvents.

Though salt raises the boiling point of water, it doesn’t do it very much. In most cases, the temperature rise is a matter of only a few degrees F, usually under five.