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eg. NaCl (s) → Na+ (g) + Cl- (g) Energy change = Lattice Energy Lattice energy is the energy required to completely separate a mole of Ionic solid compound into its gaseous Ions. It can also be a measurement of the strength of the bonds of an Ionic compound. Lattice energy is higher in an ionic compound with Ions of higher charge, and between Ions with smaller atomic radii. The potential energy of two interacting Ions Energy is given by the equation: E = k (Q¹Q&2)/d Where k is a constant, 8.99 x 10^9 J-m/C^2, d is the distance between the centers of the Ions, and the Q's are the charges on the Ions.¹ ¹ Brown, Theodore L, and H Eugene Lemay, and Bruce E. Bursten. Chemistry: The Central Science. New Jersey: Prentice Hall, 2000. 265. |
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