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Is it possible to write pV=nRT as pV=mRT?

by superjose
Tags: pvmrt, pvnrt, write
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superjose
#1
Nov27-12, 03:29 PM
P: 15
Hi people. I've been scratching my head for some time now...

My teacher of hydrology class keeps posting pV = mRT and I don't know why he is doing that.

He's trying to get the density of the air.

But I know it should go like this

pV =mRT/M...

Can someone clarify this for me?

:s

Thanks.
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jedishrfu
#2
Nov27-12, 03:51 PM
P: 2,996
Apparently its an alternative way of writing the formula given the mass:

http://crown.panam.edu/thermodynamic...t/gaslaw1f.htm

and here:

http://www.roymech.co.uk/Related/The...ific_heat.html
Borek
#3
Nov27-12, 04:37 PM
Admin
Borek's Avatar
P: 23,592
Probably he is using R that is specific for a given gas. Nonsense if you ask me, but I have seen it done in climate sciences.

superjose
#4
Nov27-12, 07:03 PM
P: 15
Is it possible to write pV=nRT as pV=mRT?

Quote Quote by jedishrfu View Post
Apparently its an alternative way of writing the formula given the mass:

http://crown.panam.edu/thermodynamic...t/gaslaw1f.htm

and here:

http://www.roymech.co.uk/Related/The...ific_heat.html
Quote Quote by Borek View Post
Probably he is using R that is specific for a given gas. Nonsense if you ask me, but I have seen it done in climate sciences.
Thanks a lot, it has solved my doubts! :D


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