ESCO Air Conditioning Practice Exam

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Heat added to the refrigerant in a vapor state after the evaporation process is called

  1. Latent heat

  2. Sensible heat

  3. Superheat

  4. BTUs

The correct answer is: Latent heat

After the refrigerant evaporates and changes from a liquid to a vapor state, the heat added to the refrigerant at this stage is known as latent heat. Latent heat is the heat energy that causes a change in phase without a change in temperature. In this case, it causes the refrigerant to change from a liquid to a vapor without increasing its temperature. Option B, sensible heat, refers to the heat that causes a change in temperature without a change in phase. Option C, superheat, is the additional heat added to the refrigerant vapor after it has completely vaporized. Option D, BTUs (British Thermal Units), is a unit of measurement for heat energy but is not specifically related to the heat added to the refrigerant in a vapor state after the evaporation process.

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