Excess molar enthalpies H-m(E) and excess molar volumes V-m(E) have been determined for {xCH(3)(CH2)(2)CH3+(1-x)CH3(CH2)(2)CH2OH} at the temperatures (298.15, 323.15, and 348.15) K and at the pressures (5, 10, an;l 15) MPa. The results are explained in terms of chemical, physical, and structural effects. A comparison is made of (partial derivative H-m(E)/partial derivative p)(T), the pressure coefficient of H-m(E), as determined directly from the H-m(E) results and as calculated from V-m(E) and the temperature derivative of V-m(E).