Chemistry / Unit 7 Chem 1203 short lesson, about 20 seconds
The Pascal and Common Pressure Units
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The idea
Pressure is measured in several units — the pascal, atmosphere, torr, millimeters of mercury, bar, and psi — related to each other by fixed conversion factors.
In practice
One atmosphere equals 101,325 pascals, 760 torr, and about 14.7 pounds per square inch.
Where people slip
These units measure the identical physical quantity; switching between them changes the number, never the pressure itself.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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