The Korsten method sometimes replaces the Edmeister method for calculating this quantity, as the latter deviates significantly for heavier hydrocarbons in petroleum fractions.
The Korsten method sometimes replaces the Edmeister method for calculating this quantity, as the latter deviates significantly for heavier hydrocarbons in petroleum fractions. A more accurate method gives this quantity as a second order function of the Watson characterization number, and in a more often used formulation of that method, this quantity is multiplied by the first order term to give vapor (*) pressure. In addition to being used in the Lee-Kesler method, it is related to the negative logarithm of the reduced saturation pressure at a reduced temperature of 0.7. All fluids which have similar values for this quantity, reduced pressure, and reduced temperature have similar compressibility factors and display similar deviation from ideal behavior. Noble gases are defined to have a value of zero for this quantity, which was introduced by K. S. Pitzer. For 10 points, identify this quantity which describes the degree to which fluid molecules deviate from being spherically symmetric.
The Korsten method sometimes replaces the Edmeister method for calculating this quantity, as the latter deviates significantly for heavier hydrocarbons in petroleum fractions.
{acentric factor}