DOI: 10.5176/2301-3761_CCECP16.22

Authors: Regina V. Entrolizo and Meng-Hui Li


Heat capacities of ternary systems containing 2- (isopropylamino)ethanol (IPAE) and (methylamino) propylamine (MAPA) were measured at 30 wt{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} and 40 wt{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} total amine concentration and temperature range of 303.15 to 353.15 K. Data gathering was conducted at atmospheric pressure using a differential scanning calorimeter (DSC). In addition, the heat capacities of aqueous binary IPAE solutions over the entire range of compositions were determined. The obtained experimental heat capacity data were represented as a function of temperature and amine concentration using a modified Söhnel and Novotný equation and a Redlich-Kister expansion for the aqueous ternary IPAE/MAPA and aqueous binary IPAE solutions, respectively. Calculated molar heat capacity results show good agreement with the experimental data at average absolute deviation values of 0.13{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465}, 0.16{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} and 0.12{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} for the pure, binary, and ternary systems, respectively, suggesting that the applied models were satisfactory.

Keywords: molar heat capacity, 2-(isopropylamino)ethanol, (methylamino) propylamine, Redlich-Kister expansion, Söhnel and Novotný equation

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