Question

When humidity changes, does entalpy chande as well?

Answer 1

Yes when Humidity changes ,Enthalpy also changes.

Enthalpy (H) is related to relative humidity as given below :-

$H=(.24*T)+(W*(1061+0444*T))$

Where

H = enthalpy (Btu/lb)

W = specific humidity (lb_water / lb_{dry air)}

T = dry-bulb temperature (F)

So with increase in humidity will increase Enthalpy .Since it is directly proportional to each other