Chemistry - Ideal Gas Question with Solution | TestHub
The apparatus shown consists of three temperature jacketed 1.642 l bulbs connected by stopcocks. Bulb A contains a mixture of H₂O(g), CO₂(g) and N₂(g) at 27°C and a total pressure of 684 mm Hg. Bulb B is empty and held at -73°C. Bulb C is also empty and held at -193°C. The stopcocks are closed and the volume of the connecting lines is zero. CO₂ sublimes at -78°C and N₂ boils at -196°C. Neglect the volume of any solid, if formed.
The stopcock between A and B is opened and the system is allowed to come to equilibrium. The pressure in A and B is now 0.24 atm. What do bulbs A and B contain?
Options:
Answer:
Solution:
At -73°C, H₂O freezes out in B while CO₂ (sublimes at -78°C) and N₂ stay gaseous and fill both bulbs. Check: n(gas) = (0.24 × 1.642)/0.0821(1/300 + 1/200) = 0.04 mol, consistent with Q15. Hence (a).
