A horizonal piston-cylinder arrangement is placed in a constant temperature bath. The piston slides in the cylinder with negligible friction, and an external force holds it in place against an initial gas pressure of 14 bar. The initial gas volume is 0.03 m. Calculate the work done (in bar m) by the gas if the external force on the piston is reduced gradually, allowing the gas to expand until its volume doubles. How much work would be done (in bar m) if the same expansion is carried out by removing a part of the external force suddenly so that the expansion occurs at a constant external pressure?