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### Pressure in terms of mols

Posted: Fri Jan 18, 2019 12:29 pm
Is the pressure lower when there are less mols because they are less collisions? or why?

### Re: Pressure in terms of mols

Posted: Fri Jan 18, 2019 2:00 pm
In part, yes. The less moles there are, the less molecules you have colliding with the surface of the container and thus applying less pressure. Also consider the equation PV= nRT, as the number of moles decreases, the pressure has to decrease.

### Re: Pressure in terms of mols

Posted: Fri Jan 18, 2019 5:12 pm
It depends on how you decrease the pressure. You can either increase the volume or introduce other unrelated gases.You can then relate the change in pressure with the change in moles.

### Re: Pressure in terms of mols

Posted: Wed Jan 23, 2019 11:46 am
Consider pressure in terms of volume as well. When the number of moles stays the same and the volume decreases, the pressure will increase because now there is a more concentrated system. Same vice versa, when the volume increases, the solution is less concentrated so the pressure decreases.