A mass of 100 kg is placed on the piston of a vertical piston-cylinder device containing nitrogen. The piston is weightless and has an area of 1 m2. The outside pressure is 100 kPa. Determine
(a) The pressure inside the cylinder. The mass placed on the piston is now doubled to 200 kg. Also, additional nitrogen is injected into the cylinder to double the mass of nitrogen.
(b) Determine the pressure inside under these changed conditions. Assume temperature to remain unchanged at 300 K and R for nitrogen to be 0.296 kJ/kg-K.