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Abstract
It has been shown that V 1(T, p, x 1) = V 1 0(T, p - π1) and that V 2(T, p, x 2) = V 2 0(T, p - π2), where π1 is the osmotic pressure of the solvent in a binary solution and π2 is the osmotic pressure of the solution solute. An increase in pressure applied to the solution, the pure solvent and pure solute from p to p + Δp compresses the solution solvent and pure solvent by equal fractions
and compresses the solutions solute and pure solute by equal fractions
Thus, the compressibilities of the solution solvent and pure solvent are related as
and likewise, the solution solute and pure solute compressibilities are related as
Since
it is shown that the compressibility of the solution and the compressibilities of the pure constituents are related as
where K 12 and V are measured at p, K 1 0 and V 1 0 are measured at p - π1, K 2 0 and V 2 0 are measured at p - π2 and all are measured at the sameT.