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A liquid that has an equilibrium vapor pressure of 129 torr at 25°C is placed into a 1-L vessel like that shown below.

A few mL of the liquid is introduced into the vessel at 25°C while it has a pressure of 1.00 atm of air in it, without allowing any of the air to escape. After a few minutes a few drops of liquid remain in the vessel. What is the pressure difference shown on the manometer?

how do i start this?

  • chem -

    I can't see the diagram and you can't draw it on this forum. If the diagram is what I think it is the pressure difference will be 129 torr.
    The new pressure in the closed vessel is 760 mm + 129 mm. It was 760.

  • chem -

    760 torr is wrong

  • chem -

    760 is not what I said. Reread my answer.

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