(a) In a vessel at 320 K and 101.3 kPa, the percentage relative humidity of moist air is 60. At 320 K the pressure of the saturated water vapour is 10.55 kPa, calculate: (i) the partial pressure of the water vapour in the vessel (kPa); (ii) the humidity H (kg kg-); (iii) the percentage humidity (%); (iv) the humid volume (m kg-); (v) the humid heat (kJ kg K-). (b) The humid air of a given initial condition as shown in (a) is cooled to temperature 290 K by a cooling coil. Calculate the amount of water removed from the air in kg s-. The flow rate of dry air is 7 kg s1 which remains constant throughout the conditioning system. The dew point of the moist air (320 K, RH = 60%) is 311 K, the pressure of the saturated water vapour 1.97 kPa at 290 K. 16 MARKSI