Heat of solution is defined as

Options

A. heat required to dissolved one mole in excess of water
B. heat evolved, when one molee is dissolved in excess of water
C. change in heat content of the system when one mole of the slute is dissolved in excess of water, so that further dilution of solutio does not bring any heat change.
D. heat required when one mole of solute is dissolved in limited quantity of water.

Answer

C

Explanation

The change in heat content of the system when one mole of solute is dissolved completely in specified amount of solvent or water is called heat of solution. If solvent is in excess, the enthalpy change is called heat of solution at infinite dilution.