Expressing the overall solvation (Kirkwood-Buff integrals) in terms of molarities ci requires a slightly different approach than seen earlier for molalities mi. In the molal scale we expressed the Gy in terms of a matrix
A of experimental properties. In the molar scale we do the opposite and express experimental properties in terms of a matrix B of Kirkwood-Buff integrals. We start with the derivative of the chemical potential, which is (Kirkwood and Buff, 1951)
The matrix elements are
Transformation from constant volume to constant pressure results in lBl ik v^k
where the partial volumes are given by
and the compressibility is kRT =
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