Excess molar enthalpies, H E , of binary mixtures of 1-octanol with ethylbenzene, ethyl benzoate, acetophenone, anisole, or methanol have been measured at 298.15 K under atmospheric pressure using an isothermal microcalorimeter. The experimental H E values are positive for all the binary mixtures over the entire range of compositions. The experimental data have been correlated with the modified Redlich-Kister polynomial equation. The results were qualitatively interpreted in terms of thermodynamic molecular interactions between the mixing components.
Excess molar enthalpies, H E , for the binary mixtures of dimethyl carbonate with o-xylene, m-xylene, p-xylene, ethylbenzene, or ethyl benzoate have been measured by using a flow-type isothermal microcalorimeter at 298.15 K under atmospheric pressure. The experimental H E values are all positive (endothermic) for these binary mixtures over the entire composition range. The maximum H E values are in the range 386.6 J‚mol -1 to 674.0 J‚mol -1 and are exhibited at about x i ) 0.5, except for the systems containing ethylbenzene and ethyl benzoate. The experimental results were represented accurately by the Redlich-Kister polynomial equation. These new H E data were also correlated with the Peng-Robinson and the cubic chain-of-rotators (CCOR) equations of state. With two adjustable interaction parameters, the CCOR equation represents the excess enthalpies of these five binary systems satisfactorily.
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