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Reference.org
Gay-Lussac's law
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<p>Gay-Lussac's law usually refers to <a href="/facts/Joseph-Louis_Gay-Lussac/co1Ne63y">Joseph-Louis Gay-Lussac</a>'s law of combining volumes of <a href="/facts/Gas/hVVAoodV">gases</a>, discovered in 1808 and published in 1809. However, it sometimes refers to the proportionality of the <a href="/facts/Volume/aeAXCBUd">volume</a> of a gas to its <a href="/facts/Thermodynamic_temperature/JXeJJPa6">absolute temperature</a> at constant <a href="/facts/Pressure/eyc37GRG">pressure</a>. The latter law was published by Gay-Lussac in 1802, but in the article in which he described his work, he cited earlier unpublished work from the 1780s by <a href="/facts/Jacques_Charles/TyjKFv8I">Jacques Charles</a>. Consequently, the volume-temperature proportionality is usually known as <i><a href="/facts/Charles%2527s_law/kU3S85Kq">Charles's law</a></i>. </p>