Nitrogen (N2) gas within a piston–cylinder assembly undergoes a compression from p1 5 20 bar, V1 = 0.5 m3 to a state where V2 = 2.75 m3. The relationship between pressure and volume during the process is pV 1.35 5 constant. For the N2, determine (a) the pressure at state 2, in bar, and (b) the work, in kJ.