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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Coulomb's Law yields an expression for the energy of interaction for a pair of point charges.

V = 2.31x10^-19 Q1Q2

V is the energy (in J) required to bring the two charges from infinite distance separation to distance r (in nm).
Q₁ and Q₂ are the charges in terms of electrons.
(i.e. the constant in the above expression is 2.31×10^-19 J nm electrons^-2)

For a group of "point" charges (e.g. ions) the total energy of interaction is the sum of the interaction energies for the individual pairs.
Calculate the energy of interaction for the square arrangement of ions shown in the diagram below

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