A gas is confined to one side of a rigid insulated container divided by a partition. The other side is initially evacuated. The following is known for the initial state of the gas: P1 = 3 bar, T1 = 380 K and V1 = 0.025 m3. When the partition is removed the gas expands to fill the entire container and achieves a final equilibrium pressure of 1.5 bar. Assuming ideal gas behavior, determine the final volume.