1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Hansen Solubility Parameter?

  1. Nov 26, 2014 #1
    For those of you who know what a Hansen Solubility Parameter is, does the "hydrogen-bonding" part means the actual hydrogen bond energy between molecules? I'm confused as to why they used mPa^0.5 instead of kJ/mol^-1 for measurement.
  2. jcsd
  3. Nov 28, 2014 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    "MPa0.5?" Or, "sqrt(MPa)?" Hansen identified three factors to consider for predictions of solubilities. He assigned units of square root of pressure to them to add them in quadrature. Activities/fugacities of solutes and solvents that do not dissociate when mixed to form a solution can be expressed in units of pressure, or as ratios of pressures. Actual energies? No. Proportional to energies of the interactions? Yes.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook