Alex Robarge 1. Argon in the amount of 1.5 kg fills a 0.04-m3 piston-cylinder device at 550 kPa. The piston is now moved by changing the weights until the volume is twice its original size. During this process, Argon\'s 550kpa temperature is maintained constant. Assuming ideal gas behavior for Argon, determine the final 0.04m pressure in the device. Given: 1.5kg