A 0.5-m3 rigid tank containing hydrogen at 20C and 600 kPa is connected by a valve to

Question:

A 0.5-m3 rigid tank containing hydrogen at 20°C and 600 kPa is connected by a valve to another 0.5-m3 rigid tank that holds hydrogen at 30°C and 150 kPa. Now the valve is opened and the system is allowed to reach thermal equilibrium with the surroundings, which are at 15°C. Determine the final pressure in the tank.