Enthalpies of formation for water + sodium dodecyl sulfate + 1-pentanol + triethanolamine mixtures

Abstract

The enthalpies of mixing of water (H 2 O) + sodium dodecyl sulfate (NaDDS) + 1-pentanol (PeOH) + triethanolamine (TEA) mixtures with different compositions at 298.15 K are determined using the thermochemical cycle. The enthalpies of dissolution of NaDDS, H 2 O, PeOH, TEA, and H 2 O + TEA + PeOH + NaDDS mixtures in 2-propanol are measured by means of calorimetry. The formation of the studied mixtures from neat components is shown to be mainly an exothermic process. The influence of the nature of components and a mixture's composition on the enthalpies of mixing is discussed.