Ideal solution

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In chemistry, an ideal solution is a solution where the enthalpy of solution is zero. The closer to zero the enthalpy of solution is, the more "ideally" the solution behaves. This becomes important in properties such as colligative properties, where the calculated values hold truer the more ideal the solution. How ideally a solution is analogous to how ideally a gas behaves (an ideal gas), as described in the kinetic theory of matter.

According to Hildebrand, the ideal solution has a zero heat of mixing.A principle cause from nonideality arises from charges in volume nonadditivity on mixing. The reader should observe that Hildebrand's use of the term ideal as a good solvent differ from the - tetha- temperature definition. which involves thermodynamically poor solvent.

Ideal solutions obey Raoult's Law.