Saturated Pressure Formula:
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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.
The calculator uses the formula:
Where:
Explanation: The Antoine equation is a simple 3-parameter fit to experimental vapor pressure data.
Details: Accurate vapor pressure estimation is crucial for distillation column design, phase equilibrium calculations, and chemical process simulations.
Tips: Enter the Antoine constants (A, B, C) for your substance and the temperature in Kelvin. Temperature must be > 0 K.
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.