1. (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
   "The law of partial pressures helps explain gas behaviour in deep-sea diving";
   - Dalton's law, Dalton's law of partial pressures

Type of: law, law of nature

Encyclopedia: Law of partial pressures