- #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?
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SUMMARY
The pressure of a gas in a manometer can be determined using the formula: Pressure = density of the liquid * gravity constant * height difference (h). In a traditional U-shaped manometer, the height difference between the two liquid columns indicates the manometric pressure. To find the absolute pressure, add the manometric pressure to the atmospheric pressure, which is typically 1 atm, 760 mmHg, or 101.3 kPa under standard conditions.
PREREQUISITES- Understanding of manometer principles
- Knowledge of fluid density and gravity constants
- Familiarity with atmospheric pressure measurements
- Basic algebra for pressure calculations
- Research different types of manometers and their applications
- Learn about fluid dynamics and pressure measurement techniques
- Explore the effects of temperature on gas pressure in manometers
- Study the relationship between liquid density and pressure readings
Students in physics or engineering, laboratory technicians, and anyone involved in pressure measurement and fluid dynamics will benefit from this discussion.
- #2
russ_watters
Mentor
- 23,803
- 11,245
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! 
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