The temperature of an open room of volume 30 m3 increases from 17°C to 27°C due to the sunshine. The atmospheric pressure in the room remains 1 x 105 Pa. If ni and nf are the number of molecules in the room before and after heating, then nf - ni will be:
(a) -1.61 x 1023
(b) 1.38 x 1023
(c) 2.5 x 1025
(d) - 2.5 x 1025
