Dalton's LawDalton's Law of Partial Pressures is a gas law that can be stated:
Ptotal = P1 + P2 + P3 + ... Pn
where P1, P2, P3, Pn are the partial pressures of the individual gases in the mixture.
Example Dalton's Law CalculationThe pressure of a mixture of nitrogen, carbon dioxide, and oxygen is 150 kPa. What is the partial pressure of oxygen if the partial pressures of the nitrogen and carbon dioxide are 100 kPA and 24 kPa, respectively?
P = Pnitrogen + Pcarbon dioxide + Poxygen
150 kPa = 100 kPa + 24 kPa + Poxygen
Poxygen = 150 kPa - 100 kPa - 24 kPa
Poxygen = 26 kPa