term on the right-hand side of Eq.(2.34) indicates the sensible heat.It depends on the temperature T above the datum 0°F ( 17.8°C).
Latent heat hfg (sometimes called hig) is the heat energy associated with the change of the state of water vapor. The latent heat of vaporization denotes the latent heat required to vaporize liquid water in to water vapor. Also,the latent heat of condensation indicates the latent heat to be removed in the condensation of water vapor in to liquid water. When moisture is added to or removed from a process or a space, a corresponding a mount of latent heat is always involved, to vaporize the water or to condense it.