Relationship between latent heat, sensible heat, and vaporization heat
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Latent heat refers to the heat contained in the condensation of a saturated vapor (such as steam) at its corresponding pressure； Sensible heat is the amount of heat absorbed or released by a saturated vapor from one temperature to another, without any change in its state ； The heat of vaporization is the amount of heat absorbed by a liquid as it vaporizes at the boiling point. Vaporization heat = Latent heat ； Sensible heat = temperature difference * specific heat ； This is my understanding; please correct me if I’m wrong.
I asked this question before as well, and the expert’s answer was that latent heat underwent a phase change, while sensible heat did not
For example, in the case of water, the latent heat refers to the enthalpy change associated with evaporation or condensation, and it is 2230 kJ/kg. The sensible heat refers to the enthalpy change resulting from a rise or fall in temperature, and its specific heat value is 4.2 kJ/kg·°C. It’s almost 500 times less, so that’s why evaporation processes are designed to be multi-effect or MVR types, in order to save energy – after all, a great deal of energy is consumed for each kilogram of liquid that is evaporated.