alleryStart learning →How is latent heat defined?
AHeat that changes phase, not temperature
BHeat that changes temperature, not phase
CHeat lost only during freezing
DHeat gained only during melting
Answer & Solution
Correct answer: A. Heat that changes phase, not temperature
1. Latent heat is heat related to a phase change of a substance rather than a change of its temperature.
2. During melting or vaporization, this heat is absorbed while temperature stays constant, not the reverse.
3. Latent heat applies during freezing and melting, and during vaporization and condensation, not to just one of those alone.
4. So heat that changes phase without changing temperature is correct.
_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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