Dalton's Law

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9 Terms

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Dalton's Law
States that the total pressure of a gas mixture is equal to the sum of the partial pressures of each individual gas.
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Partial Pressure
The pressure exerted by an individual gas in a mixture of gases.
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Mole Fraction
A measure of the number of moles of a substance compared to the total moles of matter present.
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Total Pressure
The overall pressure exerted in a gas mixture, calculated as the sum of the partial pressures.
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Atmospheric Pressure
The pressure exerted by the weight of the atmosphere, typically measured at sea level as one atmosphere.
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Ideal Gases
Gases that follow the ideal gas law, where the identities of the gases do not affect the mixture's overall properties.
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Calculation of Partial Pressure
Multiply the mole fraction of a gas by the total pressure to find the partial pressure.
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Example of Dalton's Law
In Earth's atmosphere, the partial pressures of nitrogen, oxygen, and argon sum to equal the atmospheric pressure.
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Interaction of Gases
As long as gases do not react, they can be treated independently when calculating pressures within mixtures.