Containers of different temperature

Two small containers, each with a volume of 100 cm^3, contain helium gas at 0 degrees C and 1 atm. The two containers are joined by a small open tube of negligible volume, allowing gas to flow from one container to the other. What common pressure will exist in the two containers if the temperature of one container is raised to 100 degrees C with the other is kept at 0 degrees C?