Two identical vessels A and B of equal volume, V, each, are connected by a narrow tube of negligible internal volume. Initially the whole system is filled with dry air at a pressure of 10^5 Pa and temperature 300K. The total amount of gas present in two vessels is 80.2V moles. Given that the temperature of the vessel B is now raised to 600K, the temperature of A remaining at 300K, what is the new pressure in the system? could someone help me start off? can't think of what to use... thanks !