Avogadro's law

American  

noun

Chemistry.

1. the principle that equal volumes of all gases at the same temperature and pressure contain the same number of molecules. Thus, the molar volume of all ideal gases at 0° C and a pressure of 1 atm. is 22.4 liters.

---

Avogadro's law British  

noun

1. the principle that equal volumes of all gases contain the same number of molecules at the same temperature and pressure

---

Avogadro's law Scientific  

/ ä′və-gä′drōz /

1. The principle that equal volumes of all gases under identical conditions of pressure and temperature contain the same number of molecules. Avogadro's law is true only for ideal gases (gases in which there is no interaction between the individual molecules).

---

Etymology

Origin of Avogadro's law

First recorded in 1870–75; named after A. Avogadro

Example Sentences

Avogadro’s Law says the other molecules in the air, such as oxygen and nitrogen, must leave that space.

From Washington Post

Amedeo Avogadro discovered this phenomenon in the early 19th century, and since then, it’s been known as Avogadro’s Law.

From Washington Post

There is a chapter also on Avogadro's law and the Kinetic theory, which chemical as well as physical students will read with interest.

From Project Gutenberg

The great generalization, usually known as Avogadro's law, runs thus: "Equal volumes of gases measured at the same temperature and under the same pressure contain equal numbers of molecules."

From Project Gutenberg

Like the atomic theory itself, Avogadro's law is an outcome of physical work and of physical reasoning.

From Project Gutenberg