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Homework Help: Quick Question Test at 8 am

  1. Nov 7, 2007 #1
    Quick Question...Test at 8 am!!

    When using PV = nRT does P have to be in atm? Or is it Pa?
  2. jcsd
  3. Nov 7, 2007 #2


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    Homework Helper

    depends on the R you're using...

    if you learned
    R = 8.314472 m3·Pa·K-1·mol-1

    then you need to use pressure in Pa. and volume needs to be in m^3. which R did you learn?

    if you learned
    R = 0.08205784 L·atm·K-1·mol-1

    then you need to use pressure in atm. and volume needs to be in L.

    have a look at the R using different units:

  4. Nov 7, 2007 #3
    oh ok thanks
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