The energies of interaction for (i) ion pair, (ii) ion-dipole, and (iii) dipole-dipole interactions are inversely proportional to

Concept:

• The ion-ion interaction energy between two ions carrying charge Z₁ and Z₂ separated by a distance r is given by the equation:

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• The ion-dipole interaction energy between a stationary point charge Z1 and a permanent dipole µ2 separated by a distance r is given by the equation:

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• The dipole-dipole interaction energy due to the generated electric field between the two permanent dipoles P1 and P2 is given by the equation:

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 Explanation:

• In case of ion pair interaction, the energies of interaction (E) are given by, 

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• In case of ion-dipole interaction, the energies of interaction (E) are given by, 

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• In case of dipole-dipole interaction, the energies of interaction (E) are given by, 

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​Conclusion:

• Thus, The energies of interaction for (i) ion pair, (ii) ion-dipole, and (iii) dipole-dipole interactions are inversely proportional to r, r2, and r3 respectively.