- #1
z-component
- 494
- 2
How does one use various liquids and their unique densities to determine the pressure of a gas in a manometer?
Determine the pressure of a gas in a manometer?
In summary, a manometer is a scientific instrument used to measure gas pressure in an enclosed system. It works by measuring the difference in height between the gas and a reference liquid, with the pressure being directly proportional to the height difference. The unit of measurement for pressure in a manometer is usually in mmHg or inH2O. To determine the pressure, the height difference is converted using a specific calculation based on the type of manometer. Factors such as temperature, atmospheric pressure, and the type of reference liquid can affect the accuracy of pressure measurements in a manometer. Controlling these factors is important for obtaining accurate results.
- #2
russ_watters
Mentor
- 23,161
- 10,367
Pretty simple: [weight] density times height.
- #3
z-component
- 494
- 2
Thank you.
- #4
archie
- 8
- 0
manometer
on traditional manometer, i.e U-shaped tube, the height difference between the left and the right column is the "h"
To calculate the "manometric" pressure use this formula
Pressure = density of the liquid * gravity constant * the height difference "h"
To obtain the absolute pressure simply add this manometric pressure to the atmospheric pressure (i.e. on standard condition : 1 atm, 760 mmHg, 101.3 kPa)
Hope it helps
on traditional manometer, i.e U-shaped tube, the height difference between the left and the right column is the "h"
To calculate the "manometric" pressure use this formula
Pressure = density of the liquid * gravity constant * the height difference "h"
To obtain the absolute pressure simply add this manometric pressure to the atmospheric pressure (i.e. on standard condition : 1 atm, 760 mmHg, 101.3 kPa)
Hope it helps
- #5
z-component
- 494
- 2
Yes it does greatly. Thanks! 
1. What is a manometer?
A manometer is a scientific instrument used to measure the pressure of a gas in an enclosed system.
2. How does a manometer work?
A manometer works by measuring the difference in height between the gas in the system and a reference liquid, usually mercury or water. The pressure of the gas is directly proportional to the difference in height between the two fluids.
3. What is the unit of measurement for pressure in a manometer?
The unit of measurement for pressure in a manometer is usually in millimeters of mercury (mmHg) or inches of water (inH2O).
4. How do you determine the pressure of a gas in a manometer?
To determine the pressure of a gas in a manometer, you need to measure the difference in height between the gas in the system and the reference liquid. Then, you can use the appropriate calculation based on the type of manometer (e.g. U-tube, well-type, etc.) to convert the height difference into pressure.
5. What are the factors that can affect the accuracy of pressure measurements in a manometer?
The accuracy of pressure measurements in a manometer can be affected by factors such as temperature, atmospheric pressure, and the type and condition of the reference liquid used. It is important to control these factors as much as possible to ensure accurate results.
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