A 300-L rigid vessel initially contains moist air at 150 kPa, 40C, with a relative humidity of 10%. A supply line connected to this vessel by a valve carries steam at 600 kPa, 200C. The valve is opened, and steam flows into the vessel until the relative humidity of the resultant moist air mixture is 90%. Then the valve is closed. Sufficient heat is transferred from the vessel so the temperature remains at 40C during the process. Determine the heat transfer for the process, the mass of steam entering the vessel, and the final pressure inside the vessel.