Thermodynamics of mixtures containing amines. XIV. CpmE of benzylamine with heptane at 293.15 K or with methanol, 1-propanol or 1-pentanol at 293.15–308.15 K

• CpmEs are reported for benzylamine + heptane, +methanol, +1-propanol, +1-pentanol systems.
• The heptane solution shows a W-shaped CpmE concentration dependence.
• This reveals the existence of strong non-random effects in that mixture.
• Systems with 1-alkanols are characterized by large and positive CpmE values.
• This remarks that self-association/solvation effects are predominant in such systems.

Molar excess heat capacities, CpmE, are reported for the benzylamine + heptane mixture at 293.15 K and for methanol, 1-propanol or 1-pentanol + benzylamine systems at 293.15–308.15 K. These values were determined from isobaric molar heat capacities obtained with a Setaram Micro DSC II microcalorimeter using a scanning method. The heptane solution shows a W-shaped CpmE concentration dependence, which reveals the existence of strong non-random effects. Systems including 1-alkanols are characterized by large and positive CpmE values. This remarks that self-association and/or solvation effects are predominant in such solutions. On the other hand, their CpmE curves are skewed towards higher mole fractions of the alcohol, which might be ascribed to the existence of more interactions between unlike molecules in that region.

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