1. What is Boiling Point using Trouton's Rule?

Definition: This calculator estimates the boiling point of a liquid using Trouton's rule, which relates the latent heat of vaporization to the boiling temperature.

Purpose: It provides a quick estimation of boiling points for liquids when the heat of vaporization is known.

2. How Does the Calculator Work?

The calculator uses Trouton's rule formula:

Where:

• \( T_b \) — Boiling point (Kelvin)
• \( \Delta H_{vap} \) — Latent heat of vaporization (J/mol)
• \( R \) — Universal gas constant (8.314 J/mol·K)
• 10.5 — Trouton's constant (approximate value)

Explanation: Trouton's rule states that the entropy of vaporization is approximately constant for many liquids at their boiling points.

3. Importance of Boiling Point Calculation

Details: Knowing boiling points is essential for distillation processes, chemical reactions, and material purification in chemistry and chemical engineering.

4. Using the Calculator

Tips: Enter the latent heat of vaporization in J/mol. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Trouton's rule?
A: Trouton's rule states that the entropy of vaporization is approximately constant (about 88 J/mol·K) for many liquids at their boiling points.

Q2: How accurate is this calculation?
A: It provides a reasonable estimation for many non-polar liquids, but may be less accurate for polar liquids or those with hydrogen bonding.

Q3: Why is the constant 10.5 used?
A: This comes from the typical entropy of vaporization (88 J/mol·K) divided by the gas constant (8.314 J/mol·K).

Q4: What units should I use for latent heat?
A: The calculator expects latent heat in joules per mole (J/mol).

Q5: Can I use this for any liquid?
A: It works best for non-associated liquids. For water, alcohols, and other associated liquids, the approximation may be less accurate.