Container A contains an ideal gas at a pressure of 5 x 10° Pa and at a temperature of 300 K. It is connected by a thin tube to container B which is four times the volume of A, and contains the same ideal gas at a pressure of 1 x 105 Pa at a temperature of 400 K. The connecting valve is opened, and equilibrium is achieved at a common pressure while the temperature of each container is kept constant at its initial value. What is the final pressure in the system?

Container A contains an ideal gas at a pressure of 5 x 10° Pa and at a temperature of 300 K. It is connected by a thin tube to container B which is four times the volume of A, and contains the same ideal gas at a pressure of 1 x 105 Pa at a temperature of 400 K. The connecting valve is opened, and equilibrium is achieved at a common pressure while the temperature of each container is kept constant at its initial value. What is the final pressure in the system?