Psychrometric Properties: STD ATM
25.0 10 to 25.0 90
Psychrometric properties of moist air — humidity ratio, enthalpy, dew point, wet-bulb temperature, and specific volume as functions of dry-bulb temperature and relative humidity; also includes saturation thermodynamic and transport properties (viscosity, thermal conductivity, Prandtl number, density) from ASHRAE 2021 tabulated data
| pressure condition | lookup key | dew point C (C) | dry bulb C (C) | enthalpy kJ kg (kJ/kg) | humidity ratio kg kg (kg/kg) | relative humidity pct (%) | specific volume m3 kg (m3/kg) | standard | wet bulb C (C) |
|---|---|---|---|---|---|---|---|---|---|
| STD ATM | 25.0 10 | -8.73 | 25 | 30.121 | 0.001951 | 10 | 0.8473 | ASHRAE Fundamentals 2017 Ch.1 | 9.85 |
| STD ATM | 25.0 100 | 25.04 | 25 | 76.307 | 0.020081 | 100 | 0.8719 | ASHRAE Fundamentals 2017 Ch.1 | 25.05 |
| STD ATM | 25.0 20 | 0.51 | 25 | 35.124 | 0.003915 | 20 | 0.8499 | ASHRAE Fundamentals 2017 Ch.1 | 12.5 |
| STD ATM | 25.0 30 | 6.26 | 25 | 40.158 | 0.005891 | 30 | 0.8526 | ASHRAE Fundamentals 2017 Ch.1 | 14.59 |
| STD ATM | 25.0 40 | 10.5 | 25 | 45.224 | 0.00788 | 40 | 0.8553 | ASHRAE Fundamentals 2017 Ch.1 | 16.38 |
| STD ATM | 25.0 50 | 13.89 | 25 | 50.322 | 0.009881 | 50 | 0.858 | ASHRAE Fundamentals 2017 Ch.1 | 18 |
| STD ATM | 25.0 60 | 16.73 | 25 | 55.453 | 0.011895 | 60 | 0.8608 | ASHRAE Fundamentals 2017 Ch.1 | 19.5 |
| STD ATM | 25.0 70 | 19.19 | 25 | 60.616 | 0.013922 | 70 | 0.8635 | ASHRAE Fundamentals 2017 Ch.1 | 20.94 |
| STD ATM | 25.0 80 | 21.35 | 25 | 65.813 | 0.015962 | 80 | 0.8663 | ASHRAE Fundamentals 2017 Ch.1 | 22.33 |
| STD ATM | 25.0 90 | 23.28 | 25 | 71.043 | 0.018015 | 90 | 0.8691 | ASHRAE Fundamentals 2017 Ch.1 | 23.69 |
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