Dry Air - Thermodynamic and Physical Properties
Properties like
- specific heat
- ratio of specific heats
- dynamic viscosity
- thermal conductivity - a measure of how quickly a material can absorb heat from its surroundings.
- Prandtl number
- density
- kinematic viscosity
- thermal diffusivity
of dry air at temperatures at one atmosphere from 175 K to 1900 K .
For full table with Ratio of Specific Heats, Thermal Conductivity, Prandtl Number, Kinematic Viscosity, Density and Diffusivity - rotate the screen!
| Temperature ( K ) | Specific Heat | Ratio of Specific Heats - k - ( cp /cv ) | Dynamic Viscosity - μ - (10 -5 kg/m s) | Thermal Conductivity (10 -5 kW/m K) | Prandtl Number | Kinematic Viscosity 1) - ν - ( 10 -5 m2/s) | Density 1) - ρ - (kg/m3 ) | Thermal Diffusivity - α - (10-6 m2/s) | |
|---|---|---|---|---|---|---|---|---|---|
| - cp - (kJ/kgK) | - cv - (kJ/kgK) | ||||||||
| 175 | 1.0023 | 0.7152 | 1.401 | 1.182 | 1.593 | 0.744 | 0.586 | 2.017 | |
| 200 | 1.0025 | 0.7154 | 1.401 | 1.329 | 1.809 | 0.736 | 0.753 | 1.765 | 10.23 |
| 225 | 1.0027 | 0.7156 | 1.401 | 1.467 | 2.020 | 0.728 | 0.935 | 1.569 | |
| 250 | 1.0031 | 0.7160 | 1.401 | 1.599 | 2.227 | 0.720 | 1.132 | 1.412 | 15.72 |
| 275 | 1.0038 | 0.7167 | 1.401 | 1.725 | 2.428 | 0.713 | 1.343 | 1.284 | |
| 300 | 1.0049 | 0.7178 | 1.400 | 1.846 | 2.624 | 0.707 | 1.568 | 1.177 | 22.18 |
| 325 | 1.0063 | 0.7192 | 1.400 | 1.962 | 2.816 | 0.701 | 1.807 | 1.086 | |
| 350 | 1.0082 | 0.7211 | 1.398 | 2.075 | 3.003 | 0.697 | 2.056 | 1.009 | 29.50 |
| 375 | 1.0106 | 0.7235 | 1.397 | 2.181 | 3.186 | 0.692 | 2.317 | 0.9413 | |
| 400 | 1.0135 | 0.7264 | 1.395 | 2.286 | 3.365 | 0.688 | 2.591 | 0.8824 | 37.66 |
| 450 | 1.0206 | 0.7335 | 1.391 | 2.485 | 3.710 | 0.684 | 3.168 | 0.7844 | |
| 500 | 1.0295 | 0.7424 | 1.387 | 2.670 | 4.041 | 0.680 | 3.782 | 0.7060 | |
| 550 | 1.0398 | 0.7527 | 1.381 | 2.849 | 4.357 | 0.680 | 4.439 | 0.6418 | |
| 600 | 1.0511 | 0.7640 | 1.376 | 3.017 | 4.661 | 0.680 | 5.128 | 0.5883 | |
| 650 | 1.0629 | 0.7758 | 1.370 | 3.178 | 4.954 | 0.682 | 5.853 | 0.5430 | |
| 700 | 1.0750 | 0.7879 | 1.364 | 3.332 | 5.236 | 0.684 | 6.607 | 0.5043 | |
| 750 | 1.0870 | 0.7999 | 1.359 | 3.482 | 5.509 | 0.687 | 7.399 | 0.4706 | |
| 800 | 1.0987 | 0.8116 | 1.354 | 3.624 | 5.774 | 0.690 | 8.214 | 0.4412 | |
| 850 | 1.1101 | 0.8230 | 1.349 | 3.763 | 6.030 | 0.693 | 9.061 | 0.4153 | |
| 900 | 1.1209 | 0.8338 | 1.344 | 3.897 | 6.276 | 0.696 | 9.936 | 0.3922 | |
| 950 | 1.1313 | 0.8442 | 1.340 | 4.026 | 6.520 | 0.699 | 10.83 | 0.3716 | |
| 1000 | 1.1411 | 0.8540 | 1.336 | 4.153 | 6.754 | 0.702 | 11.76 | 0.3530 | |
| 1050 | 1.1502 | 0.8631 | 1.333 | 4.276 | 6.985 | 0.704 | 12.72 | 0.3362 | |
| 1100 | 1.1589 | 0.8718 | 1.329 | 4.396 | 7.209 | 0.707 | 13.70 | 0.3209 | |
| 1150 | 1.1670 | 0.8799 | 1.326 | 4.511 | 7.427 | 0.709 | 14.70 | 0.3069 | |
| 1200 | 1.1746 | 0.8875 | 1.323 | 4.626 | 7.640 | 0.711 | 15.73 | 0.2941 | |
| 1250 | 1.1817 | 0.8946 | 1.321 | 4.736 | 7.849 | 0.713 | 16.77 | 0.2824 | |
| 1300 | 1.1884 | 0.9013 | 1.319 | 4.846 | 8.054 | 0.715 | 17.85 | 0.2715 | |
| 1350 | 1.1946 | 0.9075 | 1.316 | 4.952 | 8.253 | 0.717 | 18.94 | 0.2615 | |
| 1400 | 1.2005 | 0.9134 | 1.314 | 5.057 | 8.450 | 0.719 | 20.06 | 0.2521 | |
| 1500 | 1.2112 | 0.9241 | 1.311 | 5.264 | 8.831 | 0.722 | 22.36 | 0.2353 | |
| 1600 | 1.2207 | 0.9336 | 1.308 | 5.457 | 9.199 | 0.724 | 24.74 | 0.2206 | |
| 1700 | 1.2293 | 0.9422 | 1.305 | 5.646 | 9.554 | 0.726 | 27.20 | 0.2076 | |
| 1800 | 1.2370 | 0.9499 | 1.302 | 5.829 | 9.899 | 0.728 | 29.72 | 0.1961 | |
| 1900 | 1.2440 | 0.9569 | 1.300 | 6.008 | 10.233 | 0.730 | 32.34 | 0.1858 | |
1) At pressure 1 atm
Related Topics
• Air Psychrometrics
Moist and humid air calculations. Psychrometric charts and Mollier diagrams. Air-condition systems temperatures, absolute and relative humidities and moisture content in air.
• Densities
Densities of solids, liquids and gases. Definitions and convertion calculators.
• Material Properties
Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.
• Viscosities
Viscosities of products and chemical species at varying conditions.
Related Documents
Air - Composition and Molecular Weight
Dry air is a mechanical mixture of nitrogen, oxygen, argon and several other gases in minor amounts.
Air - Density and Specific Volume vs. Altitude
Density and specific volume of air varies with elevation above sea level.
Air - Density vs. Pressure and Temperature
Air density at pressure ranging 1 to 10 000 bara (14.5 - 145000 psi) and constant selected temperatures.
Air - Density, Specific Weight and Thermal Expansion Coefficient vs. Temperature and Pressure
Online calculator, figures and tables showing density, specific weight and thermal expansion coefficients of air at temperatures ranging -100 to 1600 °C (-140 to 2900 °F) at atmospheric and higher pressure - Imperial and SI Units.
Air - Diffusion Coefficients of Gases in Excess of Air
Diffusion coefficients (D12) for gases in large excess of air at temperatures ranging 0 - 400 °C.
Air - Dynamic and Kinematic Viscosity
Online calculator, figures and tables with dynamic (absolute) and kinematic viscosity for air at temperatures ranging -100 to 1600°C (-150 to 2900°F) and at pressures ranging 1 to 10 000 bara (14.5 - 145000 psia) - SI and Imperial Units.
Air - Humidity Ratio
The mass of water vapor present in moist air - to the mass of dry air.
Air - Moisture Holding Capacity vs. Temperature
The moisture holding capacity of air increases with temperature.
Air - Molecular Weight and Composition
Dry air is a mixture of gases where the average molecular weight (or molar mass) can be calculated by adding the weight of each component.
Air - Properties at Gas-Liquid Equilibrium Conditions
Properties of air change along the boiling and condensation curves (temperature and pressure between triple point and critical point conditions). An air phase diagram included.
Air - Specific Heat vs. Pressure at Constant Temperature
Figures and tables with isobaric (Cp) and isochoric (Cv) specific heat of air at constant temperature and pressure ranging 0.01 to 10000 bara.
Air - Specific Heat vs. Temperature at Constant Pressure
Online calculator with figures and tables showing specific heat (Cp and Cv) of dry air vs. temperature and pressure. SI and imperial units.
Air - Speed of Sound vs. Temperature
Speed of sound in air at standard atmospheric pressure with temperatures ranging -40 to 1000 °C (-40 to 1500 °F) - Imperial and SI Units.
Air - Thermal Conductivity vs. Temperature and Pressure
Online calculator with figures and tables showing air thermal conductivity vs. temperature and pressure. SI and imperial units.
Air - Thermal Diffusivity vs. Temperature and Pressure
Figures and tables withdry air thermal diffusivity vs. temperarure and pressure. SI and Imperial units.
Air - Thermophysical Properties
Thermal properties of air at different temperatures - density, viscosity, critical temperature and pressure, triple point, enthalpi and entropi, thermal conductivity and diffusivity and more.
Humid Air - Heating
Enthalpy change and temperature rise when heating humid air without adding moisture.
Humid Air and the Ideal Gas Law
Pressure, temperature and volume in a perfect ideal gas like moist air (air with water vapor).
Moist Air - Density vs. Water Content and Temperature
Density of the mix of dry air and water vapor - moist humid air.
Moist Air - Properties
Psychrometric table with humid air properties like saturation pressure, specific volume, enthalpy and entropy.
Moist Air - Water Vapor and Saturation Pressure
Saturation pressure of water vapor in moist air vs. temperature.
Moist Air - Weight of Water Vapor
Weight of water vapor in air
Prandtl Number
A dimensionless number approximating the ratio of momentum diffusivity to thermal diffusivity.
Removing Heat with Air
Calculating heat removed with air by measuring the wet bulb temperature.
Universal and Individual Gas Constants
The Universal and Individual Gas Constants in fluid mechanics and thermodynamics. Individual gas constants for the most common gases.