Determine pressure of flasks when opening stopcocks?

Three flasks with 1L of gas each are joined together with closed stopcocks. Flask A has a pressure of 5 atm, flask B has a pressure of 10 atm, and flask C has a pressure of 0 atm. How would I determine the new pressures when all flasks' stopcocks are open?

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  • 8 months ago
    Favorite Answer

    ...

    here's a quick common sense solution

    suppose you open the connection between the 10 atm flask and the 0 atm flask

    they would share and wind up at 5 atm each, of course

    then connecting the other 5 atm flask would have no additional effect

    so all 3 would be at 5 atm

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  • 8 months ago

    When the flasks' stopcocks are open, the volume of gas and the pressure in each flask will be equal. The total volume is three liters. The total pressure is 15 atmospheres.

    Pressure = 15 ÷ 3 = 5 atm

    I hope this is helpful for you.

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  • 8 months ago

    A weighted average does it:

    ((1 L × 5 atm) + (1 L × 10 atm) + (1 L × 0 atm)) / (1 L + 1 L + 1 L) = 5 atm

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  • Anonymous
    8 months ago

    Assuming the pressures are absolute

    ( 1 L * 5 atm + 1 L * 10 atm + 1 L * 0 atm ) / 3 L = average pressure

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