vapour pressure of water online calculation
Calculate Water Vapour Pressure
About Water Vapour Pressure
Water vapour pressure is the pressure exerted by water vapour in equilibrium with liquid water at a given temperature. It's crucial in meteorology, HVAC, and industrial processes.
Antoine Equation:
log₁₀(P) = A - B/(C + T)
Magnus Formula:
P = 6.112 × exp((A × T)/(B + T))
Buck Formula:
P = A × exp((B - T/C) × T/(D + T))
Where:
- P = Vapour pressure (kPa)
- T = Temperature (°C)
- A, B, C, D = Empirical constants
Temperature Range:
• Antoine: 1-100°C
• Magnus: 0-50°C
• Buck: -40 to 50°C
Applications:
• Humidity calculations
• Weather forecasting
• HVAC design
• Industrial drying
Water vapour pressure is fundamental in understanding atmospheric processes, humidity control, and phase transitions.