Abstract
The Buckingham's function is proposed as a valid tool to approximate the polytherms Pi, i.e., the internal pressure of aqueous solutions of ethylene glycol and monoethanolamine in a wide temperature range (278.15–333.15 K) using physically understandable realistic model. It is shown that the proposed modeling function approximates the temperature dependences of Pi for a great majority of aqueous solutions under scrutiny with an error of less than 3 %. In situations where the adequacy of basic Buckingham model is less significant, the use of a modified Buckingham function is suggested.
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