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Gouri Shankar posted an Question
January 08, 2020 • 04:09 am 15 points
  • IIT JAM
  • Chemistry (CY)

One litre flask contains air, water vapour and a small amount of liquid water at a pressure of 200 mmHg. If this is connected to another one litre evacuated fla

One litre flask contains air, water vapour and a small amount of liquid water at a pressure of 200 mmHg. If this is connected to another one litre evacuated flask, what wil be the final pressure of the gas mixture at equilibrium ? Assume the temperature to be 50°C. Aqueous tension at 50°C = 93 mmHg. Sol. The aqueous tension remains same in both the flask. Also flask are at same temperature

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    Eduncle best-answer

    Dear Gouri Shankar,

    Greetings!

    Here is the solution of your query - 

    The initial pressure is p1 = 200mm + 93mm = 293mm
    Let the final pressure be p2


    Now, convert the temperature to Kelvin scale,

    t1 = t2 = 323
    p1*v1/t1 = p2*v2/t2
    293*1/323 = p2*2/323


    By solving, we get
    p2 = 293/2
    p2 = 146.5mm

     

    Thank you for asking your query.

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