A 3-m3 rigid tank contains nitrogen gas at 500 kPa and 300 K. Now heat is transferred to the nitrogen in the tank and the pressure of nitrogen rises to 800 kPa. The work done during this process is
(a) 500 kJ
(b) 1500 kJ
(c) 0 kJ
(d) 900 kJ
(e) 2400 kJ