P 1 14. Two rigid boxes containing different ideal gases are placed on a table. Box A contains one mole of nitrogen at temperature To, while Box B contains one mole of helium at temperature (7/3) To. The boxes are then put into thermal contact with each other and heat flows between them until the gases reach a common final temperature. (Ignore the heat capacity of boxes). Then, the final temperature of the gases, Tf, in terms of To is (a) T, =ŽTO (b) T, TO (c) T, ==T. (2006) 15. A gaseous mixture consists of helium and 16 g of