atmospheric thermodynamics?

Consider a gas contained in two compartments adiabatic walls where M, V, T, P
(mass, volume, temperature and pressure) are different in the two compartments.
If the adiabatic wall is removed, a mixture which culminates in a state of equilibrium occurs.

A) What is the final temperature as a function of the initial weights and the initial temperature?

B) What is the final pressure in function of the initial pressure and initial volumes?