Vapor Pressure Calculator

Antoine Constant A: Antoine Constant B: Antoine Constant C: Temperature (°C):

Result

Vapor Pressure: - mmHg

A vapor pressure calculator helps determine the pressure exerted by the vapor of a liquid at a given temperature. This tool is essential for studying evaporation, boiling points, and chemical processes where pressure and temperature relationships play a significant role.

How to Use the Vapor Pressure Calculator

Step 1: Select the Type of Input

Choose whether you want to use the Clausius-Clapeyron equation or provide experimental data.

Step 2: Enter Required Parameters

Depending on the method selected, provide information such as:

• Temperature (K or °C)
• Heat of Vaporization ($\Delta H_{vap}$ in J/mol)
• Vapor Pressure at Reference Temperature

Step 3: Calculate

The calculator applies the Clausius-Clapeyron equation for predictions:

$$\ln \left(\frac{P_1}{P_2}\right) = \frac{\Delta H_{vap}}{R} \left(\frac{1}{T_2} - \frac{1}{T_1}\right)$$

Where:

• $P_1, P_2$ = Vapor pressures at temperatures $T_1, T_2$
• $R$ = Gas constant (8.314 J/mol·K)

Example Calculation

If the vapor pressure of water at 80°C is 47.4 kPa and the heat of vaporization is 40.79 kJ/mol, the calculator can predict vapor pressure at another temperature using the equation.

Benefits of the Vapor Pressure Calculator

Accurate Results

Provides reliable predictions of vapor pressure under varying conditions.

Time-Saving Tool

Eliminates manual equation-solving processes.

Flexible Applications

Applicable in research, industrial processes, and academic studies.

Applications

• Chemical Engineering: Designing distillation columns and other processes.
• Environmental Science: Studying the evaporation rates of pollutants.
• Pharmaceuticals: Analyzing solvent evaporation during drug formulation.

Conclusion

The vapor pressure calculator is a powerful tool for analyzing the relationship between temperature and vapor pressure. Its accuracy and efficiency make it indispensable for researchers, educators, and industry professionals dealing with thermodynamic processes.