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View Full Version : pressure of a gas -- quick question.


realitybugll
Oct2-10, 05:52 PM
Does the pressure of a gas (assuming temperature is constant) depend on the container's surface area as well as its volume? And if so why isn't this factored into the ideal gas law?

fss
Oct2-10, 08:56 PM
No, it does not.

Drakkith
Oct2-10, 09:09 PM
Wouldn't the surface area be directly correlated with the volume?

kcdodd
Oct2-10, 09:12 PM
The state of the particles is not assumed to be affected by proximity to any surface in the ideal gas law.

realitybugll
Oct2-10, 09:20 PM
drakkith - Well sure. But I was thinking of how identical volumes can have different surface areas.

Thanks for the responses. I get it now. Even though more collisions will be happening in a volume with a larger surface area, the collisions per unit of surface area will remain constant (and thus so will pressure). Geometrically it makes sense.