A tank containing 3 kg of CO2 at 200 kPa and 140°C is connected to a second tank containing 2 kg of N2 at 400 kPa and 60°C. A valve is opened and the two tanks are allowed to equalize in pressure. If the final temperature is 50°C, find:
a. The heat transfer in kJ
b. The final pressure in kPa
c. The entropy change in kJ/K