A rigid insulated tank is divided into two compartments by a partition. Initially, 5.60 lbm of nitrogen is introduced into one compartment at a pressure of 30.0 psia and a temperature of 140.°F.
At the same time, 13.2 lbm of carbon dioxide is introduced into the other compartment at a pressure of 15.0 psia and a temperature of 60.0°F.
The partition is then removed and the gases are allowed to mix. Assuming ideal gas behavior, find the pressure in the tank after the mixing.