0.25 kg of red-hot (700 C) coals are taken from the fireplace and left in the middle of a room. The room is 3 m x 4 m x 2.6 meters high. If we treat the room as perfectly insulated, initially at 15 C throughout, and the specific heat of the coals is: c = 2.9 kJ/kg-C and for the air: c = 1.01 kJ/kg-C and ? = 1.25 kg/m3, what will be the final average room temperature once the coals reach the room Temp?