Two rigid boxes 1/2 containing different ideal gases are placed on a table. Box A contains one mole of nitrogen at temperature T0 , while Box B contains one mole of helium at temperature (7/3) T0. 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 T0 is
![](https://sahay.guru/wp-content/uploads/2021/09/Solution-29A-1024x919.jpg)
![](https://sahay.guru/wp-content/uploads/2021/09/Solution-29B-1024x608.jpg)