What is the Vapor Pressure Calculator?

The Vapor Pressure Calculator computes the vapor pressure of a liquid using the Antoine equation, log₁₀(P) = A − (B / (C + T)), where A, B, and C are substance-specific constants and T is the temperature in °C. By entering these constants and the temperature, the calculator instantly determines the vapor pressure in mmHg. This tool is useful for chemistry students, teachers, and researchers to predict vapor pressures, study phase behavior, and perform thermodynamic calculations.

How to Use:

1. Enter Constants A, B, and C: Provide the Antoine equation constants for the substance.
2. Enter Temperature (T): Type the temperature in °C.
3. Click “Calculate”: The calculator applies the Antoine equation to compute the vapor pressure.
4. Review the Result: Use the displayed vapor pressure for phase analysis, lab calculations, or theoretical studies.