Two insulated tanks A and B are connected by a valve. Tank A has a volume of 1 m3 and initially contains argon at 300 kPa, 10°C. Tank B has a volume of 2 m3 and initially contains ethane at 200 kPa, 50°C. The valve is opened and remains open until the resulting gas mixture comes to a uniform state. Determine the final pressure and temperature.