Air Properties - Imperial Units

Thermodynamic properties of air at low pressures - imperial units

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Some thermodynamic properties of air at low pressures are indicated in the table below:

Temperature
- T -		 Enthalpy
- h -
(Btu/lbm)		 Relative Pressure
pr		 Internal Energy
- u -
(Btu/lbm)		 Specific Volume
- vr -
(R) (oF)
100 -360 23.7 0.0038 16.9 9640
200 -260 47.7 0.0432 34.0 1715
300 -160 71.6 0.1780 51.0 624
400 -60 95.5 0.486 68.1 305
500 40 119.5 1.059 85.2 175
600 140 143.5 2.00 102 111
700 240 167.6 3.45 120 75
800 340 191.8 5.53 137 54
900 440 216.3 8.41 155 40
1000 540 241.0 12.3 172 30.1
1200 740 291.3 24.0 209 18.5
1400 940 342.9 42.9 247 12.1
1600 1140 395.7 71.7 286 8.26
1800 1340 449.7 114 326 5.85
2000 1540 504.7 174 368 4.26
2500 2040 645.8 436 475 2.12
3000 2540 790.7 941 585 1.18

Volumes and Weights of Air at Different Temperatures

  • at atmospheric pressure

air temperature and specific volume and density diagram in imperial units

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  • Air Properties - Temperature, density, specific heat, thermal conductivity, expansion coefficient, kinematic viscosity and Prandtl's number for temperatures ranging -150 - 400 oC
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