In 1877, Boltzmann visualized a probabilistic way to measure the entropy of an ensemble of ideal gas particles, in which he defined entropy as proportional to the natural logarithm of the …

This phenomenon is explained by the second law of thermodynamics, which relies on a concept known as entropy. Entropy is a measure of the disorder of a system. Entropy also describes …

This page explains how to calculate entropy changes for different thermodynamic processes, such as isothermal, isobaric, isochoric, adiabatic changes, and phase transitions.

Jul 23, 2025 · The formula for calculating the change in entropy (ΔS) for a system depends on the type of process or reaction. Here are some standard formulas for entropy change:

Nov 28, 2021 · Entropy is defined as a measure of a system’s disorder or the energy unavailable to do work. Entropy is a key concept in physics and chemistry, with application in other …

Sep 12, 2025 · The idea of entropy provides a mathematical way to encode the intuitive notion of which processes are impossible, even though they would not violate the fundamental law of …

Discover how the Second Law of Thermodynamics connects entropy, energy spread, and matter spread to the spontaneity of chemical and physical changes.