Hansen Solubility Parameter?

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1. Nov 26, 2014

Pen Rie

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. Nov 28, 2014

Bystander

"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.