| Thermal Properties of Helium, He (Gaseous) | ||||||||||
| Molecular Weight, 4.0026 | ||||||||||
| Normal Boiling Point 4.2221 K | Critical Temp, 5.1953 K | Triple Point, 2.1768 K | ||||||||
| T (K) | Density | Heat Capacity | Thermal Conductivity | Viscosity | Prandtl Number | |||||
| (g/cc) | (J/gK) | (W/cmK) | (g/cm sec) | Pr | ||||||
| 1000 | 4.87E-05 | 5.200 | 3.13E-03 | 4.33E-04 | 0.72 | |||||
| 800 | 6.09E-05 | 5.200 | 2.73E-03 | 3.78E-04 | 0.72 | |||||
| 600 | 8.12E-05 | 5.200 | 2.29E-03 | 3.17E-04 | 0.72 | |||||
| 500 | 9.74E-05 | 5.197 | 2.05E-03 | 2.82E-04 | 0.72 | |||||
| 400 | 1.22E-04 | 5.195 | 1.78E-03 | 2.44E-04 | 0.71 | |||||
| 300 | 1.60E-04 | 5.194 | 1.54E-03 | 2.10E-04 | 0.71 | |||||
| 250 | 2.00E-04 | 5.193 | 1.35E-03 | 1.84E-04 | 0.71 | |||||
| 200 | 2.40E-04 | 5.193 | 1.17E-03 | 1.58E-04 | 0.70 | |||||
| 150 | 3.20E-04 | 5.194 | 9.70E-04 | 1.32E-04 | 0.70 | |||||
| 100 | 4.80E-04 | 5.195 | 7.45E-04 | 1.00E-04 | 0.70 | |||||
| 80 | 6.00E-04 | 5.196 | 6.45E-04 | 8.75E-05 | 0.70 | |||||
| 60 | 8.00E-04 | 5.199 | 5.35E-04 | 7.20E-05 | 0.70 | |||||
| 40 | 1.24E-03 | 5.206 | 4.15E-04 | 5.60E-05 | 0.70 | |||||
| 20 | 2.47E-03 | 5.245 | 2.66E-04 | 3.55E-05 | 0.70 | |||||
| 10 | 5.00E-03 | 5.415 | 1.85E-04 | 2.40E-05 | 0.70 | |||||
| 4.2 | 5.560 | 1.00E-04 | 1.25E-05 | 0.70 | ||||||
| T(K) = Temperature in Kelvin, T(C) = Temperature in Celsius | ||||||||||
| T (C) = T (K) - 273 | ||||||||||
| Heat Capacity [=] 1 J/gK = 0.23864 BTU/lbm/F | ||||||||||
| Thermal Conductivity [=] 1 W/cmK = 57.77 BTU/hr/ft/F | ||||||||||
| Viscosity [=] 1 g/cm sec = 1 poise = 241.9 lbm/ft/hr | ||||||||||
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