#1
a 2.0 L container of nitrogen has a pressure of 3.2 atm. What volume would be necessary to decrease the pressure to 1 atm?

help please?
#3
Surely it's a simple common sense/maths question. Should be 0.625 litres.
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#4
Well, you've got 3.2 atmospheres of pressure, so in order to turn that into 1 atmosphere you've got to divide the pressure by 3.2 This would mean multiplying the volume by 3.2, so you take the volume you've got (2.0 L) and multiply it by 3.2 to get 6.4 litres.

EDIT: ^ Dude above me, you've got it completely wrong, I really don't know how you got that answer, but I'm almost certain my method is correct. If you want to decrease the pressure inside a container you need to increase the volume of the container, so the answer can not be lower than 2 litres.

EDIT2: Yeah, considering the answers below, 6.4 is definitely right.
Last edited by blynd_snyper at Apr 9, 2008,
#5
umm...im kinda guessing here but from my Physics Alevel

Pv=nRT, now in this nRt will be constant, so ill relabel to X

Pv=X, from the initial info we can see that X= 6.4

Now we want P=1

so1 x v=X

Which mean v=6.4, so your answer is 6.4L....possibly.
Last edited by Mask_of_Terror at Apr 9, 2008,
#6
6.4L?

There are lots of variables in this, for example temperature. What level of difficulty is this question?

That'll affect what answer you need.
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#8
need to know T and n
#9
Quote by imgooley
need to know T and n


Just assume they're constant, thats what i did. Im guessing the guys at like AS/A2 level so i dont think it'll be in too much detail.
#11
willing to admit when I'm wrong. thank **** for A-levels where one can drop subjects one is incompetent at.
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#12
Quote by Mask_of_Terror
Just assume they're constant, thats what i did. Im guessing the guys at like AS/A2 level so i dont think it'll be in too much detail.

Yeah, I was assuming that too, just wanted to point that out. Good job.
#13
how about letting some of the nitrogen out of the container.?
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#14
Just remember for a given gas PV/T = constant
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#15
Pressure is directly proportional to volume. PV = k

(2.0L)(3.2atm) = 6.4Latm

xL(1atm) = 6.4Latm
6.4L

The answer is 6.4 Liters.
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#16
If you can't figure this out yerself you might wanna ask your teacher to explain it to you. Or ask your maths teacher how formulas work..
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#19
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#20
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Demensional Analysis Can Suck My Balls

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Yup its ****ty.

I think the guy who mentioned boyles law is right.

P1v1 = P2V2.
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#21
Quote by Muphin
Pressure is directly proportional to volume. PV = k


Pressure is inversly proportional to the volume.

Easy mistake to make!