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PV=nRT

  • 29-07-2011 11:39am
    #1
    is maith liom chocolate
    Registered Users, Registered Users 2 Posts: 74 ✭✭


    I this the same as PV=NkT

    or are they totally different, and if so, when do I use them??


Comments

  • #2
    Professor_Fink
    Registered Users, Registered Users 2 Posts: 861 ✭✭✭Professor_Fink


    is maith liom chocolate wrote: »
    I this the same as PV=NkT

    or are they totally different, and if so, when do I use them??

    They are exactly the same thing, though n and N are defined differently, and hence the constants k and R are different.


  • #3
    FISMA
    Closed Accounts Posts: 2,616 ✭✭✭FISMA


    is maith liom chocolate wrote: »
    ...when do I use them??

    You use either for an ideal gas.

    I have actually heard someone quote this for why it is possible ice skate on ice!

    The theory goes that as you apply pressure to the solid/dry ice you increase its temperature, thus melting it, and making ice skating possible.

    Never a good idea to use an ideal gas law on solids!


  • #4
    Pablo_
    Registered Users, Registered Users 2 Posts: 188 ✭✭Pablo_


    n is moles. N i presume is avagadros number. k is boltzmans constant and is used with avagadros number since boltzmans refers to the energy of the particle while R is universal gas constant ( is basically k multiplied by avagadros no.) is used with number of moles ... n with R and use N with k ..... make sense ? :eek:


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