$2-$ Tank Acontaining $1kg$ of air at $57C$ and $200$kPa is connected through a valve to another tank $B$ containing air $.$ Now the valve is opened and the entire system reaches thermal equilibrium with the surroundings at $25C$ and $300$kPa.

a$-$ Make your Assumptions for this process.

b$-$ Estimate the initial Volume, Temperature and pressure for tank $B.$

c$-$ The work and the heat transfer.