EPA On-line Tools for Site Assessment Calculation
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)|
1The 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).