27 A gas in a piston-cylinder assembly undergoes a compression process for which the relation between pressure and volume is given by pV" = constant. The initial volume is 0.1 m³, the final volume is 0.04 m³, and the final pressure is 2 bar. Determine the initial pressure, in bar, and the work for the process, in kJ, if (a) n = 0, (b) n = 1, (c) n = 1.3.