The specific humidity (kJ/kg of dry air) and enthalpy (kJ/kg of dry air) of this moist air respectively, are

Question

Dew point temperature of air at one atmospheric pressure (1.013bar) is 18⁰C. The air dry bulb temperature is 30⁰C. The saturation pressure of water at 18⁰C and 30⁰C are 0.02062 bar and 0.04241 bar respectively. The specific heat of air and water vapour respectively are 1.005 and 1.88 kJ/kg K and the latent heat of vaporization of water at 0⁰C is 2500 kJ/kg. The specific humidity (kJ/kg of dry air) and enthalpy (kJ/kg of dry air) of this moist air respectively, are                                                                                                             

      (a) 0.01051, 52.64

      (b) 0.01291, 63.15

      (c) 0.01481, 78.60

      (d) 0.1532, 81.40