Question

The standard enthalpy change of solution is the enthalpy change when one mile of solute is dissolved in a solvent to form an infinitely dilute solution under standard conditions. But why will there be an enthalpy change when dissolving a solute in a solved, isn't this a physical change?

Answer 1

Answer:

Enthalpy change of solution. The enthalpy of solution, enthalpy of dissolution, or heat of solution is the enthalpy change associated with the dissolution of a substance in a solvent at constant pressure resulting in infinite dilution. The enthalpy of solution is most often expressed in kJ/mol at constant temperature.