Problem: The barometeric pressure was 749 mmHg when the open end manometer attached to a flask holding a gas read 13.0 mmHg. (mercury level highest on the side connected to the flask.) What is the pressure of the gas in the flask in kilopascals? 1.00 atm = 101.3 kPa

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We’re being asked to determine the pressure of a gas (in kPa) using an open-end manometer.

A manometer allows you to determine the pressure of a gas (Pgas) sample by using the atmospheric pressure (Patm) and the difference in the height of mercury (h).


Different conditions for an open-end manometer are illustrated below:

When Pgas is pushing the same force as Patm

Pgas=Patm


When Pgas is pushing harder than Patm

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The barometeric pressure was 749 mmHg when the open end manometer attached to a flask holding a gas read 13.0 mmHg. (mercury level highest on the side connected to the flask.) What is the pressure of the gas in the flask in kilopascals? 1.00 atm = 101.3 kPa

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Our tutors have indicated that to solve this problem you will need to apply the Manometer concept. If you need more Manometer practice, you can also practice Manometer practice problems.

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Based on our data, we think this problem is relevant for Professor Ernst's class at UTAH.