Water Vapor Pressure vs Temperature (0–374°C)
Saturation vapor pressure of water. Essential for NPSH, flash, vacuum systems, and boiling point elevation.
Water Vapor Pressure vs Temperature
Property Data
| Temperature (°C) | Vapor Pressure (kPa) |
|---|---|
| 0 | 0.61 |
| 20 | 2.34 |
| 40 | 7.38 |
| 60 | 19.95 |
| 80 | 47.39 |
| 100 | 101.33 |
| 120 | 198.5 |
| 150 | 476 |
| 200 | 1554 |
| 250 | 3973 |
| 300 | 8581 |
| 374 | 22120 |
Key Insights
- •Exponential rise: ~double every 10°C below 100°C.
- •Critical point: 374°C, 221 bar.
- •Use Antoine equation for 1–100°C.
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