Changing the state of a gas A sample of nitrogen (N2) of mass 1g is contained in a 1000cm3 volume at an initial temperature of 288.15K. Take the nitrogen to be a perfect gas, with a molar mass of 28103kg/mol and a constant specific heat ratio of 1.40. (a) Compute the density (kg/m3) and pressure (kPa) of the gas at the initial state (b) Calculate the changes in pressure (kPa) and internal energy (J), when the system undergoes a process that produces a final volume of 50cm3 and a final temperature of 500K