EPA On-line Tools for Site Assessment Calculation
Estimated Henry's Law Constants
Unit Choices for the Henry's Law Constant
H _{cc} = Concentration/Concentration | (dimensionless--volumetric basis) ^{1} |
H _{yx} = Mole Fraction Y / Mole Fraction X | (dimensionless) |
H _{px} = Partial Pressure / Mole Fraction X | (atmospheres) |
H _{pc} = Partial Pressure / Solubility | (atm m ^{3} /mol) |
^{1}The dimensionless form based on concentrations (volumetric basic) is the most commonly used of the dimensionless values. See Staudinger and Roberts, 1996, A Critical Review of Henry's Law Constants for Environmental Applications, in Critical Reviews in Environmental Science and Technology, 26(3):205-297 for more information on various units (specifically page 292).
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