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How does Pressure affect molar mass?

  1. Jun 26, 2013 #1
    Will a higher pressure increase or decrease molar mass when using the ideal gas law, but solving for mm... (mm=mRT/PV)

    I was thinking higher pressure would = decrease in molar mass, because of the gas laws and because p=1/v but im not sure if thats right


  2. jcsd
  3. Jun 27, 2013 #2


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    Staff: Mentor

    Molar mass is not a function of pressure. PV=const, when you increase the pressure volume goes down and PV in denominator doesn't change.
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