What is the specific volume of standard air?
Table of Common Specific Volume Values
| Substance | Density | Specific Volume |
|---|---|---|
| (kg/m3) | (m3/kg) | |
| Air | 1.225 | 0.78 |
| Ice | 916.7 | 0.00109 |
| Water (liquid) | 1000 | 0.00100 |
What is the specific volume of air in cubic feet?
For dry air, its density at sea level at 59 °F (15 °C) and 14.7 psi (1013.25 hPa) (mean sea-level pressure), is approximately 0.0765 lb/cu ft (1.225 kg/m³) .
What is the constant specific weight of air?
(SI) units and 62.4 Ib/ft3 in English units. The specific weight of air at the same temper- ature is 12 N/m3 (0.0779 lb/fe).
What is the specific weight of air at a temperature?
approximately 1.2754 kg/m3
At IUPAC standard temperature and pressure (0 °C and 100 kPa), dry air has a density of approximately 1.2754 kg/m3.
What is the density of air in LB ft3?
0.0765 lb/ft^3
In Metric units: 1.225 kg/m^3. In Imperial units: 0.0765 lb/ft^3.
What is the weight of air?
We know that air weighs 14.7 psi or pounds per square inch at sea level – meaning about 15 pounds are pressing down on every square inch of you.
How do you find specific weight from specific volume?
The specific volume is the reciprocal of the density of the material, which is the mass per unit volume: r = (1/v) = (m/V). The “Specific Gravity” of a substance is the ratio of its mass to that of an equal volume of water at the same temperature and pressure.
What is the density of air in slug ft3?
At sea level and at 15 °c, air has a density of approximately 1.225 kg/m 3 (0.001225 g/cm 3, 0.0023769 slug/ft 3, 0.0765 lbm/ft 3) according to isa (international standard atmosphere).
What is the air density of the mesosphere?
The air in the mesosphere has extremely low density: 99.9% of the mass of the atmosphere is below the mesosphere. As a result, air pressure is very low (Figure below).
What is the density of air at 25 C?
1.184
| Temperature | Density | Specific weight |
|---|---|---|
| [°C] | [kg/m3] | [N/m3] |
| 20 | 1.204 | 11.81 |
| 25 | 1.184 | 11.61 |
| 30 | 1.164 | 11.42 |
How do you measure air weight?
If you fill a container (ball, balloon) with air and put it on a scale, you are measuring the weight of the ball plus the weight of the air, *minus* the weight of the volume of air that’s displaced by the inflated ball (this is the buoyant force).
What is the weight formula?
The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg.
What is the density of a cubic foot of air?
In Imperial or US customary measurement system, the density is equal to 0.080713 pound per cubic foot [lb/ft³], or 0.000747344 ounce per cubic inch [oz/inch³] . See the humidity calculator to compute the density of air at various values of temperature, relative humidity and pressure.
What is the specific volume of air at sea level?
Density and the specific volume of air vary with elevation above sea level. The density of air varies with pressure (the Ideal Gas Law) and the altitude above sea level. Mean absolute pressure at sea level is approximately 760 mmHg (101.325 kPa, kN/m 2) with a variation is about +/- 5%.
What is the density of 10m3 air in kg m3?
From the table above – the density of air is 0.946 kg/m 3 at 100 o C. The mass of 10 m 3 air can be calculated as From the table above – the density of air is 1.205 kg/m 3 at 20 o C. The mass of 10 m 3 air can be calculated as An air balloon with volume 10 m 3 is heated to 100 o C. The temperature of the surrounding air is 20 o C.
What is the output density and specific weight of air?
The output density is given as kg/m 3, lb/ft 3, lb/gal (US liq) and sl/ft 3 . Specific weight is given as N/m 3 and lb f / ft 3. Note! Temperature must be within the ranges -100 – 1600 °C, -140 – 2900 °F, 175 – 1900 K and 315 – 3400 °R to get valid values. Air density and specific weight at atmospheric pressure: