An insulated rigid 2-m³ tank A contains carbon dioxide gas at 200◦C, 1MPa. An uninsulated rigid 1-m³ tank B contains ethane, (C₂H₆), gas at 200 kPa, room temperature 20◦C. The two tanks are connected by a one-way check valve that will allow gas to flow from A to B but not from B to A. The valve is opened, and gas flows from tank A to B until the pressure in B reaches 500 kPa and the valve is closed. The mixture in B tank is kept at room temperature due to heat transfer. Find the total number of moles and the ethane mole fraction at the final state in tank B. Find the final temperature and pressure in tank A and the heat transfer to/from tank B. 

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To A B FIGURE P11.138