Excess molar enthalpies of {x(1)CH(3)OH + x(2)C(6)H(6) + (1-x(1)-x(2))c-C6H12} and {x(1)CH(3)OH + x(2)C(6)H(6) + (1-x(1)-x(2))CH3(CH2)(5)CH3}, measured with an isothermal dilution calorimeter at the temperature 298.15 K, are reported. The experimental values have been correlated with a mole-fraction association model having binary and ternary parameters.