Boiling Point Pressure Calculator

Inverse Antoine Equation:

\[ T = \frac{B}{A - \log(P)} - C \]

Pressure (P):

mmHg

Constant A:

Constant B:

Constant C:

Boiling Point Temperature (T):

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1. What is a Boiling Point Pressure Calculator?

Definition: This calculator estimates the boiling point temperature of a liquid based on pressure using the inverse Antoine equation.

Purpose: It helps chemists, engineers, and students determine the boiling temperature at different pressures for various substances.

2. How Does the Calculator Work?

The calculator uses the inverse Antoine equation:

\[ T = \frac{B}{A - \log(P)} - C \]

Where:

\( T \) — Boiling point temperature (°C)
\( P \) — Pressure (mmHg)
\( A, B, C \) — Substance-specific Antoine constants

Explanation: The equation relates the vapor pressure of a substance to its temperature.

3. Importance of Boiling Point Calculation

Details: Accurate boiling point prediction is crucial for distillation processes, chemical reactions, and material safety data.

4. Using the Calculator

Tips: Enter the pressure in mmHg and the Antoine constants for your substance. Default values are for water (100-374°C range).

5. Frequently Asked Questions (FAQ)

Q1: What are typical Antoine constants?
A: For water (100-374°C): A=8.07131, B=1730.63, C=233.426. Other substances have different constants.

Q2: What pressure units does this use?
A: The calculator uses mmHg (millimeters of mercury), a common unit for vapor pressure.

Q3: What's the valid pressure range?
A: The equation works for P > 0 mmHg. Very low pressures may give unrealistic results.

Q4: Where can I find Antoine constants?
A: Chemical engineering handbooks or databases like NIST provide constants for many substances.

Q5: Why does boiling point change with pressure?
A: Higher pressure makes it harder for molecules to escape the liquid phase, raising the boiling point.