(a) De Priester chart K-values for hydrocarbons, low temperature The UNIQUAC. Typical examples of this approach are the methods given by Hengstebeck (1961), and the Smith-Brinkley method (1960) which are described in Section 11.7 (C&R Vol. The methods below will give you cubic measures such as ft 3 or m 3 depending on your units of measure.