How to find the total pressure of a gas mixture

Asked by admin @ 22/11/2021 in Chemistry viewed by 348 People

Determine the total pressure of a gas mixture that contains O2, N2 and He, if the partial pressure of the gases are : P(O2) = 200 mm Hg, P (N2) = 350 mm Hg, P ( He2) = 428 mm Hg

Answered by admin @ 22/11/2021

Answer:

P(total) = 978 mmHg

Explanation:

Given data:

Total pressure of gas = ?

Partial pressure of O₂ gas = 200 mmHg

Partial pressure of N₂ gas = 350 mmHg

Partial pressure of He gas = 428 mmHg

Solution:

According to Dalton law of partial pressure,

The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.

Mathematical expression:

P(total) = P₁ + P₂ + P₃+ ............+Pₙ

P(total) = P(O₂) + P(N₂) + P(He)

P(total) = 200 mmHg + 350 mmHg + 428 mmHg

P(total) = 978 mmHg

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