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Gases - Thermal Properties

Properties at Atmospheric Pressure

Gas TemperatureC

ConductivityW/m-C

Density

kg/m3Specific Heat

J/kg-CDynamic Viscosity

kg/m-sKinematic Viscosity

m2/s

Thermal Diffusivity

m2/s

Helium -129.0 0.0928 0.3379 5.2E+3 12.55E-6 37.11E-6 52.75E-6

Helium -73.0 0.1177 0.2435 5.2E+3 15.66E-6 64.38E-6 92.88E-6

Helium -18.0 0.1357 0.1906 5.2E+3 18.17E-6 95.5E-6 136.75E-6

Helium 93.0 0.1691 0.1328 5.2E+3 23.05E-6 173.6E-6 244.9E-6

Helium 204.0 0.197 0.10204 5.2E+3 27.5E-6 269.3E-6 371.6E-6

Helium 316.0 0.225 0.08282 5.2E+3 31.13E-6 375.8E-6 521.5E-6

Helium 427.0 0.251 0.07032 5.2E+3 34.75E-6 494.2E-6 666.1E-6

Helium 527.0 0.275 0.06023 5.2E+3 38.17E-6 634.1E-6 877.4E-6

Hydrogen -123.0 0.0981 0.16371 12.602E+3 5.595E-6 34.18E-6 47.5E-6

Hydrogen -73.0 0.1282 0.1227 13.54E+3 6.813E-6 55.53E-6 77.2E-6

Hydrogen -23.0 0.1561 0.09819 14.059E+3 7.919E-6 80.64E-6 113.0E-6

Hydrogen 27.0 0.182 0.08185 14.314E+3 8.963E-6 109.5E-6 155.4E-6

Hydrogen 77.0 0.206 0.07016 14.436E+3 9.954E-6 141.9E-6 203.1E-6

Hydrogen 127.0 0.228 0.06135 14.491E+3 10.864E-6 177.1E-6 256.8E-6

Hydrogen 177.0 0.251 0.05462 14.499E+3 11.779E-6 215.6E-6 316.4E-6

Hydrogen 227.0 0.272 0.04918 14.507E+3 12.636E-6 257.0E-6 381.7E-6

Hydrogen 277.0 0.292 0.04469 14.532E+3 13.475E-6 301.6E-6 451.6E-6

Hydrogen 327.0 0.315 0.04085 14.537E+3 14.285E-6 349.7E-6 530.6E-6

Hydrogen 427.0 0.351 0.03492 14.574E+3 15.89E-6 455.1E-6 690.3E-6

Hydrogen 527.0 0.384 0.0306 14.675E+3 17.4E-6 569.0E-6 856.3E-6

Hydrogen 527.0 0.412 0.02723 14.821E+3 18.78E-6 690.0E-6 0.0010217

Oxygen -123.0 0.01367 2.619 917.8 11.49E-6 4.387E-6 5.688E-6

Oxygen -73.0 0.01824 1.9559 913.1 14.85E-6 7.593E-6 10.214E-6

Oxygen -23.0 0.02259 1.5618 915.7 17.87E-6 11.45E-6 15.794E-6

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Oxygen 27.0 0.02676 1.3007 920.3 20.63E-6 15.86E-6 22.353E-6

Oxygen 77.0 0.0307 1.1133 929.1 23.16E-6 20.8E-6 29.68E-6

Oxygen 127.0 0.03461 0.9755 942.0 25.54E-6 26.18E-6 37.68E-6

Oxygen 177.0 0.03828 0.8682 956.7 27.77E-6 31.99E-6 46.09E-6

Oxygen 227.0 0.04173 0.7801 972.2 29.91E-6 38.34E-6 55.02E-6

Oxygen 277.0 0.04517 0.7096 988.1 31.97E-6 45.05E-6 64.1E-6

Nitrogen -73.0 0.01824 1.7108 1.0429E+3 12.947E-6 7.568E-6 10.224E-6

Nitrogen 27.0 0.0262 1.1421 1.0408E+3 17.84E-6 15.63E-6 22.044E-6

Nitrogen 127.0 0.03335 0.8538 1.0459E+3 21.98E-6 25.74E-6 37.34E-6

Nitrogen 227.0 0.03984 0.6824 1.0555E+3 25.7E-6 37.66E-6 55.3E-6

Nitrogen 327.0 0.0458 0.5624 1.0756E+3 29.11E-6 51.19E-6 74.86E-6

Nitrogen 427.0 0.05123 0.4934 1.0969E+3 32.13E-6 65.13E-6 94.66E-6

Nitrogen 527.0 0.05609 0.4277 1.1225E+3 34.84E-6 81.46E-6 116.85E-6

Nitrogen 627.0 0.0607 0.3796 1.1464E+3 37.49E-6 91.06E-6 139.46E-6

Nitrogen 727.0 0.06475 0.3412 1.1677E+3 40.0E-6 117.2E-6 162.5E-6

Nitrogen 827.0 0.0685 0.3108 1.1857E+3 42.28E-6 136.0E-6 185.91E-6

Nitrogen 927.0 0.07184 0.2851 1.2037E+3 44.5E-6 156.1E-6 209.32E-6

Carbon dioxide -53.0 0.010805 2.4733 783.0 11.105E-6 4.49E-6 5.92E-6

Carbon dioxide -23.0 0.012884 2.1657 804.0 12.59E-6 5.813E-6 7.401E-6

Carbon dioxide 27.0 0.016572 1.7973 871.0 14.958E-6 8.321E-6 10.588E-6

Carbon dioxide 77.0 0.02047 1.5362 900.0 17.205E-6 11.19E-6 14.808E-6

Carbon dioxide 127.0 0.02461 1.3424 942.0 19.32E-6 14.39E-6 19.463E-6

Carbon dioxide 177.0 0.02897 1.1918 980.0 21.34E-6 17.9E-6 24.813E-6

Carbon dioxide 227.0 0.03352 1.0732 1.013E+3 23.26E-6 21.67E-6 30.84E-6

Carbon dioxide 277.0 0.03821 0.9739 1.047E+3 25.08E-6 25.74E-6 37.5E-6

Carbon dioxide 327.0 0.04311 0.8938 1.076E+3 26.83E-6 30.02E-6 44.83E-6

Ammonia, NH3 0.0 0.022 0.7929 2.177E+3 9.353E-6 11.8E-6 13.08E-6

Ammonia, NH3 50.0 0.027 0.6487 2.177E+3 11.035E-6 17.0E-6 19.2E-6

Ammonia, NH3 100.0 0.0327 0.559 2.236E+3 12.886E-6 23.0E-6 26.19E-6

Ammonia, NH3 150.0 0.0391 0.4934 2.315E+3 14.672E-6 29.7E-6 34.32E-6

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Ammonia, NH3 200.0 0.0467 0.4405 2.395E+3 16.49E-6 37.4E-6 44.21E-6

Water vapor 107.0 0.0246 0.5863 2.06E+3 12.71E-6 21.6E-6 20.36E-6

Water vapor 127.0 0.0261 0.5542 2.014E+3 13.44E-6 24.2E-6 23.38E-6

Water vapor 177.0 0.0299 0.4942 1.98E+3 15.25E-6 31.1E-6 30.7E-6

Water vapor 227.0 0.0339 0.4405 1.985E+3 17.04E-6 38.6E-6 38.7E-6

Water vapor 277.0 0.0379 0.4005 1.997E+3 18.84E-6 47.0E-6 47.5E-6

Water vapor 327.0 0.0422 0.3652 2.026E+3 20.67E-6 56.6E-6 57.3E-6

Water vapor 377.0 0.0464 0.338 2.056E+3 22.47E-6 66.4E-6 66.6E-6

Water vapor 427.0 0.0505 0.314 2.085E+3 24.26E-6 77.2E-6 77.2E-6

Water vapor 477.0 0.0549 0.2931 2.119E+3 26.04E-6 88.8E-6 88.3E-6

Water vapor 527.0 0.0592 0.2739 2.152E+3 27.86E-6 102.0E-6 100.1E-6

Water vapor 577.0 0.0637 0.2579 2.186E+3 29.69E-6 115.2E-6 113.0E-6

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