Avogadro's law

noun

Chemistry.

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

noun

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

Avogadro's law

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).

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Word History and Origins

Origin of Avogadro's law¹

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

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Example Sentences

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

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

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

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

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Of late years the great naturalists, Clausius, Helmholtz, Joule, Rankine, Clerk Maxwell and Thomson have developed the physical theory of molecules, and have shown that Avogadro's law may be deduced as a necessary consequence from a few simple physical assumptions.

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Avogadro's constant Avogadro's number

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