1. What is Saturated Pressure using Antoine Equation?

Definition: This calculator estimates the saturated vapor pressure of a substance using the Antoine equation, which relates vapor pressure to temperature.

Purpose: It helps chemical engineers and scientists determine the vapor pressure of pure substances at given temperatures.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{sat} \) — Saturated vapor pressure (Pa)
• \( A \) — Antoine equation constant (dimensionless)
• \( B \) — Antoine equation constant (K)
• \( T \) — Temperature (K)
• \( C \) — Antoine equation constant (K)

Explanation: The Antoine equation is a simple 3-parameter fit to experimental vapor pressure data.

3. Importance of Saturated Pressure Calculation

Details: Accurate vapor pressure estimation is crucial for distillation column design, phase equilibrium calculations, and chemical process simulations.

4. Using the Calculator

Tips: Enter the Antoine constants (A, B, C) for your substance and the temperature in Kelvin. Temperature must be > 0 K.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find Antoine constants?
A: They are available in chemical engineering handbooks and databases for many common substances.

Q2: What are typical ranges for Antoine constants?
A: A is typically 15-20, B is 1500-3000 K, and C is -50 to 250 K, but varies by substance.

Q3: What temperature range is valid?
A: The equation is valid only within the temperature range specified for the constants.

Q4: What units does this calculator use?
A: Temperature and B/C constants are in Kelvin, result is in Pascals.

Q5: Can I use this for mixtures?
A: No, the Antoine equation is for pure substances only.