Air flows steadily through a compressor at the rate of 1.57 kg/min. The compressor requires 5 kW power input to compress the air from 100 kPa and 17ºC (State 1) at the inlet to 600 kPa (State 2) at the exit. Heat loss of 0.3 kW occurs from the compressor to the surroundings. Consider variable specific heats for air. Calculate the change in specific entropy (kJ/kg-K) of air.