What type of heat is found in Column 8 (labeled Hf) of the Steam Tables?

In the Steam Tables, Column 8, labeled Hf, represents the enthalpy of saturated water at a given temperature or pressure. This value corresponds to the amount of heat required to change water from liquid to vapor at constant pressure without a change in temperature, which specifically refers to latent heat. Latent heat is the energy absorbed or released during a phase change.

Sensible heat refers to the heat that causes a change in temperature without a change in phase, while specific heat is the amount of energy required to raise the temperature of a unit mass by one degree Celsius. Latent heat of fusion specifically pertains to the transition between solid and liquid phases, which is not relevant to the context of saturated water and steam.

Thus, the correct identification of Column 8 as representing latent heat helps clarify the concept of heat transfer during phase changes in thermodynamics, particularly within the operation of refrigeration systems.