SDN members see fewer ads and full resolution images. Join our non-profit community!

Orgo question.

Discussion in 'DAT Discussions' started by mut9ya, Mar 24, 2007.

  1. mut9ya

    mut9ya 5+ Year Member

    94
    0
    Feb 6, 2007
    Does great viscosity equal to high melting point?
    I know that the more branched means higher melting point and lower boiling point. So which has a greater viscosity? more or less branched?
     
  2. SDN Members don't see this ad. About the ads.
  3. Lonely Sol

    Lonely Sol cowgoesmoo fan! 10+ Year Member

    684
    0
    Dec 13, 2005
    Atlanta, GA
    Boiling point is homologous to melting point as far as I know. So, what you said about branch compound is wrong. I always thought, if more branched then both melting poing and boiling point decreases and also higher m.w, higher mp and bp.

    *Someone correct me if I am wrong!

    As far as viscosity is concerned:

    In general, thick liquids are thick because their molecules have a good grip on each other -- either bonded to each other, or tangled up in each other. Thus, it is harder to pull them away from each other -- and that is, of course, what happens when a liquid boils. So, viscosity and boiling point are related by virtue on molecular interaction. Heating reduces viscosity because heating makes the molecules move faster. Under such conditions of increased molecular motion, their grip on each other weakens.
    Therefore, the thicker the solution (higher viscosity, higher the mp)
     
  4. SimSimma

    SimSimma Banned Banned

    39
    0
    Jan 30, 2007
    Brooklyn
    viscosity reffers to how thick something is, so if you increse the temperature in decrease the viscosity... good luck
     

Share This Page