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← ScienceWhich lattice energy change occurs as ionic compounds are heated to melting point?
A)Increased vibrational energy overcomes electrostatic forces✓
B)Electron delocalization lowers potential energy
C)Covalent bond formation stabilizes the lattice
D)Nuclear fusion releases binding energy
💡 Explanation
When ionic compounds are heated, ion vibrational energy rises because thermal energy is converted to kinetic energy, disrupting their electrostatic attraction in the lattice and promoting phase transition. Therefore vibrational energy increases, rather than alternatives which require different bonding/structural or nuclear conditions.
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