Manometer Pressure Problems, Introduction to Barometers - Measuring Gas & Atmospheric Pressure

This chemistry video tutorial explains how to solve manometer pressure problems in addition to explaining how manometers work. It also provides an introduction into barometers which are used to measure atmospheric pressure. Manometers are used to measure the pressure of a gas by measure the height difference between the fluid based mercury columns and adding or subtracting that value from the atmospheric pressure.
Pressure & Boiling Point:
• Introduction to Pressu...
Gas Pressure Unit Conversion:
• Gas Pressure Unit Conv...
Manometers & Barometers:
• Manometer Pressure Pro...
Water Height & Mercury Column:
• Height of Water in a B...
Boyle's Law Practice Problems:
• Boyle's Law Practice P...
_________________________________
How Does a Bike Pump Work?
• How Does a Bike Pump W...
Charles Law:
• Charles' Law
Gay Lussac's Law:
• Gay Lussac's Law Pract...
Avogadro's Law:
• Avogadro's law Practic...
Ideal Gas Law Problems:
• Ideal Gas Law Practice...
Combined Gas Law Problems:
• Combined Gas Law Problems
_______________________________
Gas Stoichiometry Problems:
• Gas Stoichiometry Prob...
Molar Mass of a Gas at STP:
• Molar Mass of a Gas at...
Gas Density at STP:
• Gas Density and Molar ...
Dalton's Law of Partial Pressure:
• Dalton's Law of Partia...
Collecting Gas Over Water:
• Collecting Gas Over Wa...
_______________________________
Gas Density of Mixtures:
• Gas Density & Average ...
Average Kinetic Energy of a Gas:
• Average Kinetic Energy...
Graham's Law of Effusion:
• Graham's Law of Effusion
Kinetic Molecular Theory of Gases:
• Kinetic Molecular Theo...
Gas Law Problems Review:
• Gas Law Problems Combi...
_________________________________
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I didn't understand how can we add the value of pressure to the difference in height or the values 50 and 60 are in mmHg can you explain me? Thanks

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one of the limbs of a mercury manometer is connected to a gas cylinder the mercury level in the limb connected to the gas cylinder is 10 cm higher than that in the other then the gauge pressure of the gas is____cm of hg. I got 66 cm of hg but the answer says -10 cm of hg. Am I right or is the book right?

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Does the answer depends if the manometer is Closed or Open?.

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Does the patm have to be in mm or can it be cm???

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meters are not a unit of pressure. "millimeters of mercury" is. its the same thing as torr. Youve heard of torr right?

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I'm probably wrong, but I don't think a partially filled tube with 720mmHg will raise to 760mm when flipped into the Hg tank. The tube has to be COMPLETELY full before flipping, otherwise you a have 760mmHg air pocket in your tube--the level will not change. If you had 780mmHg, yes it would drop, the outside atmospheric pressure is too weak to support more than a 760 mm column of dense Hg.

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