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Q: Amount of heat per unit mass required to change a substance from a solid to a liquid at the same temperature and pressure.
  • A. Latent heat of liquefaction
  • B. Resilience by the above method
  • C. Vaporization
  • D. Sublimation
Correct Answer: Option A - Latent heat of liquefaction is the amount of heat gained by a solid object to convert it into a liquid without any increase in temperature or pressure.
A. Latent heat of liquefaction is the amount of heat gained by a solid object to convert it into a liquid without any increase in temperature or pressure.

Explanations:

Latent heat of liquefaction is the amount of heat gained by a solid object to convert it into a liquid without any increase in temperature or pressure.