3.0-mol N2 gas and 2.0-mol O2 gas were initially at 1.0 P atm and 25 oC. They were confined in two different adiabatic chambers separated by a moveable adiabatic wall. The total volume of the two chambers is V1 + V2 = 50.0 L.

Now the temperature of the chamber of N2 gas is increased to 125 oC, but the chamber of O2 gas remains at 25 oC. Determine the volume of the chamber of N2 gas when the system reaches the mechanical equilibrium. Assume ideal gas behavior for both gases.

Would you please check your post for typos.

What do you mean by a 1.0 P atm pressure?