# Trouton's rule

> English word · Proper noun

## Definitions
1. A rule stating that the entropy of vaporization is almost the same value, about 85–88 J/(K·mol), for various kinds of liquids at their boiling points.

## Etymology
Named after Frederick Thomas Trouton.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/trouton-s-rule