Multiple choice

The SI unit of latent heat is

  1. J/g

  2. J/kg

  3. J/kg K

  4. J/g K
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B Correct answer
Explanation

Latent heat is the amount of energy absorbed or released during a phase change per unit mass. Since it's energy per mass, the SI unit is joule per kilogram (J/kg). J/g K and J/kg K are units for specific heat capacity, which involves temperature change. Latent heat itself has no temperature component.

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