In 1801, English scientist John Dalton realized that each gas in a mixture of gases exerts a pressure, called a partial pressure.
John Dalton (1766-1844), an English schoolteacher, made a number of important contributions to chemistry.
He was the first to notice the independent behavior of gases in mixtures.
In 1803, he published a summary statement concerning this behavior that is now known as Dalton’s law of partial pressure, although the French chemist and physicist Joseph Gay-Lussac claimed that the ‘Law’ had previously been described during the French Revolution attributed it to Citizen Charles.
Dalton’s law of partial pressure states that the total pressure exerted by a mixture of gases is the sum of the partial pressures of the individual gases present.
Dalton’s Law
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