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

  1. Nov 27, 2012 #1
    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?


  2. jcsd
  3. Nov 27, 2012 #2


    Staff: Mentor

    Last edited by a moderator: May 6, 2017
  4. Nov 27, 2012 #3


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    Staff: Mentor

    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.
  5. Nov 27, 2012 #4
    Thanks a lot, it has solved my doubts! :D
    Last edited by a moderator: May 6, 2017
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