Dalton's 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

（化学・物理学）混合気体の全圧は各成分気体の分圧の和に等しく、成分気体の圧力は同じ温度で単独で同じ体積を占めた場合に及ぼす圧力に等しいとする法則