Both stopcocks are opened and the system is again allowed to come to equilibrium. The pressure throu — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

At -193°C, $CO_2$(g) completely solidifies into dry ice $CO_2$(s) inside Bulb C. Only $N_2$(g) remains in the gaseous state throughout the connected bulbs A, B, and C. Water remains solidified as $H_2O$(s) in Bulb B. Hence, the gaseous phase consists purely of $N_2$(g) in all three bulbs.