law of partial pressures

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Noun

1.

law of partial pressures - (chemistry and physics) law stating that the pressure exerted by a mixture of gases equals the sum of the partial pressures of the gases in the mixture; the pressure of a gas in a mixture equals the pressure it would exert if it occupied the same volume alone at the same temperature Dalton's law of partial pressures, Dalton's law law of nature, law - a generalization that describes recurring facts or events in nature; "the laws of thermodynamics" chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"