In a sealed piston cylinder device Nitrogen gas executes a CARNOT POWER CYCLE. The source and sink temperatures are 999 K and 333 K. Minimum pressure in the cycle is 20 kPa. The minimum volume is (1/40) of the maximum volume in the cycle. The cycle work is 30 kJ for one complete cycle. Kinetic and potential energy are negligible. Find the Nitrogen gas mass. The volume changes at each point in the cycle.