Water Vapor Pressure
Water vapor pressure is the pressure of water vapor at a given temperature, also the component of atmospheric pressure contributed by the presence of water vapor.
Water Vapor Pressure formula |
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\(\large{ p = 10^{\; A \;-\; \frac{ B }{ C \;+\; T } } }\) | ||
Symbol | English | Metric |
\(\large{ p }\) = vapor pressure of water | \(\large{\frac{lbf}{in^2}}\) | \(\large{Pa}\) |
\(\large{ A }\) = Antoine constant for water | \(\large{dimensionless}\) | |
\(\large{ B }\) = Antoine constant for water | \(\large{dimensionless}\) | |
\(\large{ C }\) = Antoine constant for water | \(\large{dimensionless}\) | |
\(\large{ T }\) = water temperature | \(\large{F}\) | \(\large{C}\) |
Antoine Constants for Water |
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Water Temperature | A | B | C |
1 to 100 degrees celsius | 8.07131 | 1730.63 | 233.426 |
99 to 374 degrees celsius | 8.14019 | 1810.94 | 244.485 |