- #1
gg_1
- 4
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does anyone happen to know the density of compressed air?
What Is the Density of Compressed Air?
- Thread starter gg_1
- Start date
In summary, the density of compressed air can vary based on the pressure and temperature it is under, but for 1 atmosphere of pressure, dry air at 20 degrees Celsius has a density of approximately 1.20 kg/m3. This calculation is based on the ideal gas law and is only accurate for high temperatures and low pressures. More information can be found on the compressibility chart page on Wikipedia.
- #2
minger
Science Advisor
- 1,496
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It's whatever I want it to be.
- #3
mgb_phys
Science Advisor
Homework Helper
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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
- 113
- 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
- 7
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
- 1,566
- 7
>0.0 kg/m3
FAQ: What Is the Density of Compressed Air?
What is the density of compressed air?
The density of compressed air varies depending on the pressure and temperature it is compressed at. On average, it can range from 1.2 kg/m3 to 1.4 kg/m3.
How is the density of compressed air calculated?
The density of compressed air can be calculated using the ideal gas law, which states that the density is equal to the pressure divided by the product of the temperature and the gas constant. Alternatively, it can also be measured using specialized equipment such as a density meter.
What factors affect the density of compressed air?
The density of compressed air is primarily affected by the pressure and temperature it is compressed at. Other factors such as the composition of the air and the presence of impurities can also have a small impact on the density.
Why is the density of compressed air important?
The density of compressed air is important for several reasons. It is used to determine the performance of compressed air systems, such as the amount of air that can be stored in a tank. It is also crucial for calculating the energy efficiency and cost of compressed air usage.
How does the density of compressed air compare to other gases?
Compressed air has a lower density compared to other gases, such as carbon dioxide and nitrogen. This is because air is primarily made up of nitrogen and oxygen, which have lower molecular weights compared to other gases. This means that a given volume of compressed air will contain fewer molecules compared to other gases, resulting in a lower density.