- #1
gg_1
- 4
- 0
does anyone happen to know the density of compressed air?
What Is the Density of Compressed Air?
- Thread starter gg_1
- Start date
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SUMMARY
The density of compressed air can be calculated using the ideal gas law formula, pV = mRT, which simplifies to m/V = p/RT. The pressure (p) is measured in Pascals, volume (V) in cubic meters, mass (m) in kilograms, R is the gas constant (287 kJ/kg), and temperature (T) in Kelvin. For dry air at 1 atm (approximately 100,000 Pa) and 20 degrees Celsius, the density is approximately 1.20 kg/m³. This calculation is valid primarily for conditions of high temperature and low pressure, up to 40-50 bar.
PREREQUISITES- Understanding of the ideal gas law
- Familiarity with pressure measurements in Pascals
- Basic knowledge of gas constants and their applications
- Awareness of temperature scales, particularly Kelvin
- Research the effects of temperature on gas density
- Explore the compressibility chart for various gases
- Learn about the behavior of gases under high pressure conditions
- Investigate real gas behavior versus ideal gas assumptions
Students and professionals in physics, engineering, and environmental science who require a deeper understanding of gas properties and calculations related to compressed air.
- #2
minger
Science Advisor
- 1,494
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It's whatever I want it to be.
- #3
mgb_phys
Science Advisor
Homework Helper
- 7,901
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minger said:
Start with the density of normal air then multiply by however many atmospheres of pressure it's under.
- #4
kandelabr
- 110
- 0
you should start with
pV = mRT, divide by (V R T), and you get
m/V = p/RT.
p - pressure [Pa], V - volume [m3], m - mass [kg], R - gas constant (287 kJ/kg), T - temperature [K]
note that this is for ideal gas and so only accurate for high temperatures (room) and low pressures (up to 40, 50 bar).
check out this page: http://en.wikipedia.org/wiki/Compressibility_chart
pV = mRT, divide by (V R T), and you get
m/V = p/RT.
p - pressure [Pa], V - volume [m3], m - mass [kg], R - gas constant (287 kJ/kg), T - temperature [K]
note that this is for ideal gas and so only accurate for high temperatures (room) and low pressures (up to 40, 50 bar).
check out this page: http://en.wikipedia.org/wiki/Compressibility_chart
- #5
Bob S
- 4,662
- 8
For 1 atm (760 mm Hg, or ~100,000 Pa) dry air at 20 deg C, the density is about 1.20 kilograms per cubic meter.
- #6
Topher925
- 1,562
- 7
>0.0 kg/m3
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