Table 2.
Compressibility factor, Z, for CO2-free air
| Temperature | Pressure | Relative Humidity in Percent | |||||
|---|---|---|---|---|---|---|---|
| (Celsius) | (pascals) | (mm Hg) | 0 | 25 | 50 | 75 | 100 |
| 19.0 | 70000 | 525.0 | .99973 | .99972 | .99971 | .99968 | .99966 |
| 75000 | 562.5 | .99972 | .99970 | .99969 | .99967 | .59964 | |
| 80000 | 600.0 | .99970 | .99968 | .99967 | .99965 | .99963 | |
| 85000 | 637.6 | .99968 | .99967 | .99965 | .99963 | .99961 | |
| 90000 | 675.1 | .99966 | .99965 | .99963 | .99961 | .99959 | |
| 95000 | 712.6 | .99964 | .99963 | .99961 | .99960 | .99957 | |
| 100000 | 750.1 | .99962 | .99961 | .99959 | .99958 | .99956 | |
| 101325 | 760.0 | .99962 | .99960 | .99959 | .99957 | .99955 | |
| 105000 | 787.6 | .99960 | .99959 | .99958 | .99956 | .99954 | |
| 110000 | 825.1 | .99958 | .99957 | .99956 | .99954 | .99952 | |
| 20.0 | 70000 | 525.0 | .99974 | .99973 | .99971 | .99969 | .99966 |
| 75000 | 562.5 | .99972 | .99971 | .99969 | .99967 | .99964 | |
| 80000 | 600.0 | .99970 | .99969 | .99967 | .99965 | .99963 | |
| 85000 | 637.6 | .99969 | .99967 | .99966 | .99964 | .99961 | |
| 90000 | 675.1 | .99967 | .99666 | .99964 | .99962 | .99966 | |
| 95000 | 712.6 | .99965 | .99964 | .99962 | .99960 | .99958 | |
| 100000 | 750.1 | .99963 | .99962 | .99960 | .99958 | .99956 | |
| 101325 | 760.0 | .99963 | .99961 | .99960 | .99958 | .99956 | |
| 105000 | 787.6 | .99961 | .99960 | .99958 | .99957 | .99954 | |
| 110000 | 825.1 | .99959 | .99958 | .99957 | .99955 | .99953 | |
| 21 .0 | 70000 | 525.0 | .99975 | .99973 | .99971 | .99969 | .99966 |
| 75000 | 562.5 | .99973 | .99972 | .99970 | .99967 | .99964 | |
| 80000 | 600.0 | .99971 | .99970 | .99968 | .99966 | .99963 | |
| 85000 | 637.6 | .99969 | .99968 | .99966 | .99964 | .99961 | |
| 90000 | 675.1 | .99968 | .99966 | .99965 | .99962 | .99960 | |
| 95000 | 712.6 | .99966 | .99965 | .99963 | .99961 | .99958 | |
| 100000 | 750.1 | .99964 | .99963 | .99961 | .99959 | .99956 | |
| 101325 | 760.0 | .99964 | .99962 | .99961 | .99959 | .99956 | |
| 105000 | 787.6 | .99962 | .99961 | .99959 | .99957 | .99955 | |
| 110000 | 825.1 | .99960 | .99959 | .99958 | .99956 | .99953 | |
| 22.0 | 70000 | 525.0 | .99975 | .99974 | .99972 | .99969 | .99966 |
| 75000 | 562.5 | .99974 | .99972 | .99970 | .99968 | .99964 | |
| 80000 | 600.0 | .99972 | .99971 | .99969 | .99966 | .99963 | |
| 85000 | 637.6 | .99970 | .99969 | .99967 | .99964 | .99961 | |
| 90000 | 675.1 | .99968 | .99967 | .99965 | .99963 | .99960 | |
| 95000 | 712.6 | .99967 | .99965 | .99963 | .99961 | .99958 | |
| 100000 | 750.1 | .99965 | .99964 | .99962 | .99960 | .99957 | |
| 101325 | 760.0 | .99965 | .99963 | .99961 | .99959 | .99956 | |
| 105000 | 787·6 | .99963 | .99962 | .99960 | .99958 | .99955 | |
| 110000 | 825.1 | .99962 | .99960 | .99958 | .99956 | .99954 | |
| 23·0 | 70000 | 525.0 | .99976 | .99975 | .99972 | .99969 | .99966 |
| 75000 | 562.5 | .99974 | .99973 | .99971 | .99968 | .99964 | |
| 80000 | 600.0 | .99973 | .99971 | .99969 | .99966 | .99963 | |
| 85000 | 637.6 | .99971 | .99969 | .99967 | .99965 | .99962 | |
| 90000 | 675.1 | .99969 | .99968 | .99966 | .99963 | .99960 | |
| 95000 | 712.6 | .99968 | .99966 | .99964 | .99962 | .99959 | |
| 100000 | 750.1 | .99966 | .99964 | .99962 | .99960 | .99957 | |
| 101325 | 760.0 | .99965 | .99964 | .99962 | .99960 | .99957 | |
| 105000 | 787.6 | .99964 | .99963 | .99961 | .99958 | .99956 | |
| 110000 | 825.1 | .99963 | .99961 | .99959 | .99957 | .99954 | |
| 24.0 | 70000 | 525.0 | .99977 | .99975 | .99973 | .99969 | .99965 |
| 75000 | 562.5 | .99975 | .99973 | .99971 | .99968 | .99964 | |
| 80000 | 600.0 | .99973 | .99972 | .99970 | .99967 | .99963 | |
| 85000 | 637.6 | .99972 | .99970 | .99968 | .99965 | .99962 | |
| 90000 | 675.1 | .99970 | .99969 | .99966 | .99964 | .99960 | |
| 95000 | 712.6 | .99968 | .99967 | .99965 | .99962 | .99959 | |
| 100000 | 750.1 | .99967 | .99965 | .99963 | .99961 | .99957 | |
| 101325 | 760.0 | .99966 | .99965 | .99963 | .99960 | .99957 | |
| 105000 | 787.6 | .99965 | .99964 | .99962 | .99959 | .99956 | |
| 110000 | 825.1 | .99964 | .99962 | .99960 | .99957 | .99954 | |
| 25.0 | 70000 | 525.0 | .99977 | .99976 | .99973 | .99970 | .99965 |
| 75000 | 562.5 | .99976 | .99974 | .99971 | .99968 | .99964 | |
| 80000 | 600.0 | .99974 | .99972 | .99970 | .99967 | .99963 | |
| 85000 | 637.6 | .99973 | .99971 | .99968 | .99965 | .99962 | |
| 90000 | 675.1 | .99971 | .99969 | .99967 | .99964 | .99960 | |
| 95000 | 712.6 | .99969 | .99968 | .99965 | .99962 | .99959 | |
| 100000 | 750.1 | .99968 | .99966 | .99964 | .99961 | .99958 | |
| 101325 | 760.0 | .99967 | .99966 | .99963 | .99961 | .99957 | |
| 105000 | 787.6 | .99966 | .99964 | .99962 | .99960 | .99956 | |
| 110000 | 825.1 | .99965 | .99963 | .99961 | .99958 | .99955 | |
| 26.0 | 70000 | 525.0 | .99978 | .99976 | .99973 | .99970 | .99965 |
| 75000 | 562.5 | .99976 | .99975 | .99972 | .99968 | .99964 | |
| 80000 | 600.0 | .99975 | .99973 | .99970 | .99967 | .99963 | |
| 85000 | 637.6 | .99973 | .99971 | .99969 | .99966 | .99961 | |
| 90000 | 675.1 | .99972 | .99970 | .99967 | .99964 | .99960 | |
| 95000 | 712.6 | .99970 | .99968 | .99966 | .99963 | .99959 | |
| 100000 | 750.1 | .99969 | .99967 | .99964 | .99961 | .99958 | |
| 101325 | 760.0 | .99968 | .99966 | .99964 | .99961 | .99957 | |
| 105000 | 787.6 | .99967 | .99965 | .99963 | .99960 | .99956 | |