Because humidity depends only on water's vapor pressure and temperature, are the saturation vapor densities listed in Table 13.5 valid in an atmosphere of helium at a pressure of 1.01 x 10⁵ N/m², rather than air? Are those values affected by altitude on Earth?

Data given in Table 13.5

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Temperature (°C) Vapor pressure (Pa) Saturation vapor density (g/m³) -50 -20 -10 0 5 10 15 20 25 30 37 40 50 4.0 1.04 x 10² 2.60 × 10² 6.10 x 10² 8.68 x 10² 1.19 x 10³ 1.69 × 10³ 2.33 x 10³ 3.17 x 10³ 4.24 x 10³ 6.31 x 10³ 7.34 x 10³ 1.23 x 104 0.039 0.89 2.36 4.84 6.80 9.40 12.8 17.2 23.0 30.4 44.0 51.1 82.4