A 50 m3 insulated chamber containing air at 40oC, 100 kPa and R.H. 20% is connected to

Question:

A 50 m3 insulated chamber containing air at 40oC, 100 kPa and R.H. 20% is connected to another 50 m3 insulated chamber containing air at 20oC, 100 kPa and R.H. 100%. The valve is opened and the system is allowed to reach thermal equilibrium. Determine
(a) The final pressure (p3),
(b) Temperature (T3) and
(c) Relative humidity.