Chemistry / Unit 7 Chem 1266 short lesson, about 20 seconds
Dalton's Law of Partial Pressures
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The idea
In a mixture of gases that do not react, the total pressure equals the sum of each gas's own partial pressure.
In practice
Combining oxygen at 300 kPa and nitrogen at 450 kPa in one container produces a total pressure of 750 kPa.
Where people slip
Each gas contributes its own pressure as though the others were not present — mixing dilutes no individual gas's contribution.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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