(a) Change in enthalpy: An ideal solution is formed by mixing two components with similar properties. Hence, no heat should be absorbed or evolved when the two components are mixed so that enthalpy change of an ideal solution should be zero.
∆H(mixing) = 0
(b) Change in volume: In ideal solution intermolecular interactions between the components (A – B or solvent-solute) are of the same magnitude as the intermolecular intractions found in the pure components.
So, the volume of solution should be equal to the sum of volume of two components, means volume change on mixing should be zero.
∆V(mixing) = 0
