<Table> <Tr> <Td> </Td> <Td> This article's lead section may not adequately summarize its contents . Relevant discussion may be found on the talk page . To comply with Wikipedia's lead section guidelines, please consider modifying the lead to provide an accessible overview of the article's key points in such a way that it can stand on its own as a concise version of the article . (March 2016) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article's lead section may not adequately summarize its contents . Relevant discussion may be found on the talk page . To comply with Wikipedia's lead section guidelines, please consider modifying the lead to provide an accessible overview of the article's key points in such a way that it can stand on its own as a concise version of the article . (March 2016) </Td> </Tr> <P> In chemistry, Henry's law is a gas law that states that the amount of dissolved gas is proportional to its partial pressure in the gas phase . The proportionality factor is called the Henry's law constant . It was formulated by the English chemist William Henry, who studied the topic in the early 19th century . In his publication about the quantity of gases absorbed by water, he described the results of his experiments: </P> <Dl> <Dd>... "water takes up, of gas condensed by one, two, or more additional atmospheres, a quantity which, ordinarily compressed, would be equal to twice, thrice, &c . the volume absorbed under the common pressure of the atmosphere ." </Dd> </Dl>

Henry's law states that the solubility of a gas in a liquid