A well-sealed room contains 60 kg of air at 200 kPa and 25°C. Now solar energy enters the room at an average rate of 0.8 kJ/s while a 120-W fan is turned on to circulate the air in the room. If heat transfer through the walls is negligible, the air temperature in the room in 30 min will be
(a) 25.6°C
(d) 52.5°C
(b) 49.8°C
(e) 63.4°C
(c) 53.4°C