화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.49, No.2, 286-290, 2004
Measurement and correlation of excess molar enthalpies for ethylene glycol plus alkanol systems at the temperatures (298.15, 308.15, and 323.15) K
Excess molar enthalpies for a series of ethylene glycol + alkanol (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, and 2-butanol) systems were measured over the entire molar composition range at (298.15, 308.15, and 323.15) K under atmospheric pressure using a flow-type isothermal microcalorimeter. The values of H-E increase slightly with increasing temperature for all of the ethylene glycol + n-alkanol (methanol, ethanol, 1-propanol, and 1-butanol) systems over the entire composition range. In addition, a dependence of H-E on the chain length of the n-alkanol was observed. However, the same temperature dependency as in the ethylene glycol + n-alkanol systems was not observed for ethylene glycol + 2-alkanol (2-propanol and 2-butanol) systems. The experimental results were compared with values correlated using the Redlich-Mster equation.