Belarus State University Laboratory of Thermodynamics of Organic Compounds, Research Institute for Physical and Chemical Problems Leningradskaya 14 Minsk 220080 Belarus Leningradskaya 14 Minsk 220080 Belarus
A correlation formula to estimate chemical exergies of oil fractions and fuel mixtures from enthalpy of combustion and atomic
composition is developed. Heat capacity ofa mixture of 10 hydrocarbons was measured in the range 5–290 K. It was shown that
contribution of entropy of mixing to exergy of typical oil fractions is about –0.11% in the approximation of ideal solution,
and about –0.18% for a real solution.