A Piston-Cylinder device haves 1.303 kg of nitrogen gas at 120 kPa and 27 C. The gas is now compressed slowly in a polytropic process during which PV^(1.27)=constant. The process ends when the volume is reduced by one-half. Determine the entropy change of nitrogen during this process.
Delta S= ____ kj/K (round to 4 decimal places)