Abstract

The effective interaction energy of two test particles immersed in a molecular fluid of finite volume is defined and expressed in terms of the molecular pair correlation function. The specific problem of electric multipoles immersed in a fluid of polar nonpolarizable molecules filling a spherical volume is then analyzed in detail. The long-range part of the effective interaction of the test multipoles is obtained to leading order in 1/V. A comparison is made with similar results obtained in the case of infinite volume.

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