Notices
Results 1 to 3 of 3

Thread: Liquid molar density dependence on Temperature

  1. #1 Liquid molar density dependence on Temperature 
    New Member
    Join Date
    May 2007
    Posts
    1
    Hello,
    I want to know the formula, by which LIQUID MOLAR Density is dependent on temperature!
    I know the formula, by which, VAPOUR MOLAR DENSITY is dependent on Temperature. Its the Universal Gas Law
    PV = nRT
    n/V = Rho_v = P/R/T

    But what is the formula, by which Liquid molar density (Rho_l) is dependent on Temperature!

    Thanks in advance


    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Freshman Dantak's Avatar
    Join Date
    Oct 2006
    Location
    Germany
    Posts
    27
    It stands to note that PV=nRT is not the universal gas law, it is the ideal gas law. Universal implies that it applies to all gases and the law only applies to ideal gases, of which are only monatomic gases. Since the volume of liquids is independent of temperature, so is the molar density. So the formula for molar density of a liquid would simply be n/V, moles per unit volume. You have to remember that the ideal gas law only applies to gases.


    Reply With Quote  
     

  4. #3  
    Forum Freshman César's Avatar
    Join Date
    Sep 2006
    Location
    Spain, Europe
    Posts
    61
    Since the volume of liquids is independent of temperature
    False! At least for my mercury thermometer.

    If you want a formula that links molar density with temperature you can use the coefficient of thermal expansion.

    Best regards,

    César
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •