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Thermodynamic definition of a dilute ideal solution

in a solution, all the components bar one - the solvent - are very dilute, the munber of molecules of solute is so low that they have no effect on the behavior of the solvent, which could be said to exhibit perfect behavior. In this case, we say that we have a dilute ideal solution. Because of the distinction between solvent and solute, we shall use convention (II) - the infinitely dilute solution referenee - to express the activity coefficients. [Pg.43]

We know that for the solvent, conventions (I) and (II) are identical, and as, hypothetically, it should exhibit perfect behavior, we will have  [Pg.43]

From this, we deduce that = constant. Yet we know, because of the convention chosen, that if the solution is in its reference state, = 1. Hence, the value of the constant is 1, and the activity coefficients for all the components will be = I at any temperature. [Pg.43]


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