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

[superjose]

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.

 

[jedishrfu]

Apparently its an alternative way of writing the formula given the mass:

http://crown.panam.edu/thermodynamics/homework/javascript/gaslaw1f.htm

and here:

http://www.roymech.co.uk/Related/Thermos/Thermos_Specific_heat.html

 

[Borek]

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]

Apparently its an alternative way of writing the formula given the mass:

http://crown.panam.edu/thermodynamics/homework/javascript/gaslaw1f.htm

and here:

http://www.roymech.co.uk/Related/Thermos/Thermos_Specific_heat.html

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