Definition of Gay–Lussac's law
1 : a statement in chemistry and physics: when two or more gaseous substances combine to form a gaseous compound the volume of the product is either equal to the sum of the volumes of the factors or is less than and bears a simple ratio to this sum —called also law of combining volumes — compare avogadro's law
2 : charles' law
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Origin and Etymology of gay–lussac's law
after J. L. Gay-Lussac
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