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Charles, Gay-Lussac and of course Boyle

  1. Oct 4, 2008 #1
    I'm having a little bit of an issue trying to find an equation to use when the initial and final temperature, pressure and volume are all variable

    I know [tex]\frac{V1}{T1}[/tex] =[tex]\frac{V2}{T2}[/tex]

    and [tex]\frac{P1}{T1}[/tex] =[tex]\frac{P2}{T2}[/tex]

    and P1V1=P2V2

    But I want to combine them so that I can get the V2 when the Pressure and Temperature 1 and 2 both vary.
     
  2. jcsd
  3. Oct 4, 2008 #2
    maybe P1V1/T1 = P2V2/T2 ? Sorry I used to know this but i can't seem to remember
     
  4. Oct 4, 2008 #3

    GCT

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    If I understood your question accurately ... yes , assuming that the moles are constant.
     
  5. Oct 5, 2008 #4
    The combined gas law states that when moles are constant, P1V1T2=P2V2T1 (basically what has been said above, but getting rid of those fractions).
     
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