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Which pair of phase changes both move a substance into a more energetic state?

AFreezing and condensation
BMelting and vaporization
CMelting and freezing
DCondensation and deposition
Answer & Solution
Correct answer: B. Melting and vaporization
1. Phase changes to a more energetic state include melting, vaporization, sublimation, and ionization. 2. Melting takes a substance from solid to liquid, and vaporization takes it from liquid to gas, both increasing energy. 3. Freezing and condensation both move a substance to a less energetic state, the opposite direction. 4. Melting and freezing are opposite processes, so they cannot both increase energy at once. 5. So melting and vaporization is the correct pair. _Source: OpenStax Physics (CC BY 4.0), Ch 11 "Thermal Energy, Heat, and Work", section 11.3 Phase Change and Latent Heat_
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