A 0.9-m3 rigid tank is divided into two equal compartments by a partition. One compartment contains Ne

Question:

A 0.9-m3 rigid tank is divided into two equal compartments by a partition. One compartment contains Ne at 20°C and 100 kPa, and the other compartment contains Ar at 50°C and 200 kPa. Now the partition is removed, and the two gases are allowed to mix. Heat is lost to the surrounding air during this process in the amount of 15 kJ. Determine
(a) The final mixture temperature and
(b) The final mixture pressure.