Question

State Dalton's law of partial pressure​

Answer 1

Answer:-

Dalton's law of Partial pressure:-

This law states that, when two or more than two chemically inert gases are kept in a closed container, the total pressure exerted by the gaseous mixture is equal to the sum of the partial pressures of individual gases.

That is;

P = P₁ + P₂ + P₃.... + Pₙ.

Applications of Dalton's law:-

• Mole fraction of a gas in a mixture of gases = Partial pressure of gas/Total pressure of the gaseous mixture.

• % of a gas in a mixture = (Partial pressure of gas/Total pressure) × 100

• Pressure of dry gas collected over water is; Pₜₒₜₐₗ = P(moist air) = P(dry gas) + P(water vapour) [ Here; P(water vapour) is the aqueous tension and is directly proportional to absolute temperature ]

Limitations of Dalton's law:-

• It is applicable only for inert gases like N₂ , H₂ , Cl₂ , etc

• It is not applicable for chemically reactive gases like CO and Cl₂ , etc.

Answer 2

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According to Dalton's law of partial pressures, the total pressure by a mixture of gases is equal to the sum of the partial pressures of each of the constituent gases. The partial pressure is defined as the pressure each gas would exert if it alone occupied the volume of the mixture at the same temperature.