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_
Keep practising Thermal Energy, Heat, and Work
Browse all Thermal Energy, Heat, and Work questions for GCE O-Level (Singapore), or explore more Physics topics.
Related questions
A 3.00 kg sample at its boiling point is entirely boiled away by 5360 kJ of heat. What is How much energy is required to melt 7.00 kg of aluminum already at its melting point? Use In which phases of matter can the particles change position relative to their neighbours?How is latent heat defined?If 2500 kJ of heat is just enough to melt 3.0 kg of an unknown substance, what is that subHow much energy is needed to melt 2.00 kg of ice already at 0 degrees Celsius? Use Lf(wateHow much heat is needed to vaporize 1.000 kg of water already at 100 degrees Celsius? Use How much heat is needed to melt 1.000 kg of ice already at 0 degrees Celsius? Use the late