Fig. 2. Vapour pressure of branched and unsaturated carboxylic acids. The symbols correspond to the experimental data for 3-methyl-2-butenoic acid,32 2-butenoic acid,33 2-pentenoic acid,34 2-hexenoic acid32 and 2-heptenoic acid.35 The filled symbols indicate experimental data used in the parameter estimation, while the open symbols are the data used to determine the adequacy of the theoretical description. The continuous curves correspond to calculations and predictions using SAFT-γ Mie group-contribution approach.
