Qn. B2 (a) State Dalton's Law of Additive Pressure. (b) A room contains moist air comprising of 0.3 moles of oxygen, 0.6 moles of nitrogen and 0.1 moles of water vapor at room temperature (25 C) and pressure (1 atm). Given that the specific enthalpy of air at 25 C is 298.18 kJ/kg, determine the following: Total number of moles of moist air in the room [2 marks] Specific enthalpy of the oxygen [3 marks] Specific enthalpy of the nitrogen [3 marks] Specific enthalpy of the water vapor [3 marks] ii. [2 marks] iii. iv.