Dalton's Partial Pressure Calculator
From Mole Fraction
Two-Gas Mixture
Air Composition at Altitude
Formula
P_i = χ_i × P_total | P_total = P₁ + P₂ + P₃ + ... | χ_i = n_i / n_total
Frequently Asked Questions
What is Dalton's law of partial pressures?
Dalton's law states that the total pressure of a gas mixture equals the sum of the partial pressures of each individual gas. Each gas's partial pressure equals its mole fraction times the total pressure: P_i = χ_i × P_total.
What is partial pressure used for?
Partial pressure is used in respiratory physiology (O₂ and CO₂ transport), scuba diving calculations, industrial gas mixing, and weather prediction (water vapor pressure).
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