Melting temperatures have been measured and the solid liquid phase diagram was constructed for n butanol+benzene.It is a simple eutectic system.Excess molar Gibbs free energies were calculated at 298 15 K

the largest value is 1 110 J/mol.The data were treated with Kretschmer Wiebe association model.The cross association constant K AB s have been calculated

the value of K AB for n butanol and benzene is 55 7 at 298 15 K.