Boiling Point Formula (Trouton's Rule):
From: | To: |
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.
The calculator uses Trouton's rule formula:
Where:
Explanation: Trouton's rule states that the entropy of vaporization is approximately constant for many liquids at their boiling points.
Details: Knowing boiling points is essential for distillation processes, chemical reactions, and material purification in chemistry and chemical engineering.
Tips: Enter the latent heat of vaporization in J/mol. The value must be > 0.
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.