Dalton’s Law of Partial Pressures formulated was by John Dalton in 1801. Dalton’s Law of Partial Pressures The law was formulated by John Dalton in 1801.Dalton’s Law of Partial Pressures  states that by the mixture of non-reactive gases is equal to the sum of the partial pressures of individual gases. The pressures which these gases would exert if they were enclosed separately in the same volume and under the same conditions of temperature.

In a mixture of gases, the pressure exerted by the individual gas is called partial pressure. Gases are generally collected over water and therefore are moist.

The pressure of dry gas can be calculated by subtracting the vapour pressure of water from the total pressure of the moist gas which contains water vapours also. Pressure exerted by saturated water vapour is called aqueous tension.If total pressure of a mixture of gases is known, the equation can be used to find out the pressure exerted by individual gases.

 

Gay Lussac’s Law gives the relationship  between  pressure  and temperature.

The pressure of a gas is directly proportional to absolute temperature.

 Gay Lussac’s law states that at constant volume, pressure the  of a fixed amount of a gas varies directly with the temperature.

PressureTemperature Relationship can be derived from Boyle’s law and Charles’ Law

 

Pressure vs temperature (Kelvin) graph at constant molar volume is called an isochore.