Which is the formula for calculating total pressure based on Dalton's Law?

Which is the formula for calculating total pressure based on Dalton's Law?

• A. Ptotal = P1 + P2
• B. Ptotal = P1 + P2 + P3...
• C. Ptotal = P1 x P2
• D. Ptotal = (P1 + P2) / 2

Answer: (B)

Dalton's Law of Partial Pressures states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of each individual gas in the mixture. This can be articulated mathematically as Ptotal = P1 + P2 + P3 + ... for any number of gases present. Each P represents the pressure exerted by one gas, and by adding these partial pressures together, you arrive at the total pressure of the gas mixture. The formula captures the principle that each gas in a mixture contributes independently to the total pressure, regardless of the identities of the gases or their interactions. This understanding is fundamental to gas behavior and is extensively applied in various scientific contexts, including chemistry and physics.

Dalton's Law of Partial Pressures states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of each individual gas in the mixture. This can be articulated mathematically as Ptotal = P1 + P2 + P3 + ... for any number of gases present. Each P represents the pressure exerted by one gas, and by adding these partial pressures together, you arrive at the total pressure of the gas mixture.

The formula captures the principle that each gas in a mixture contributes independently to the total pressure, regardless of the identities of the gases or their interactions. This understanding is fundamental to gas behavior and is extensively applied in various scientific contexts, including chemistry and physics.