Two vessels X and Y, which contain the same kind of ideal gas, are connected by a tap which is initially closed. The volume and pressure of the gas in the vessels are listed as follows: Vessel X Y Pressure / Pa Volume/m 4 105 1.3 x 10-2 3 105 7 10-3 When the tap is opened, what will be the final pressure in the vessels if the temperature inside the vessels is constant throughout the process?