in direct proportion to the temperature. Other gas laws Graham's law states that the rate at which gas molecules diffuse is inversely proportional to the square root of the gas density at constant temperature. Combined with Avogadro's law (i.e. since equal volumes have equal number of molecules) this is the same as being inversely proportional to the root of the molecular weight. Dalton's law of partial pressures states that the pressure of a mixture of gases simply is the sum of the partial pressures of the individual components. Dalton's law is as follows: and all component gases and the mixture are at the same temperature and volume where Ptotal is the total pressure of the gas mixture Pi is the partial pressure, or pressure of the component gas at the given volume and temperature. Amagat's law of partial volumes states that the volume of a mixture of gases (or the volume of the container) simply is the sum of the partial volumes of the individual components. Amagat's law is as follows: and all component gases and the mixture are at the same temperature and pressure where Vtotal is the total volume of the gas mixture, or the volume of the container, Vi is the partial volume, or volume of the component gas at the given pressure and temperature. Henry's law states that At constant temperature, the amount of a given gas dissolved in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid. Real gas law formulated by Johannes Diderik van der Waals (1873). References External links History of thermodynamics