The molar integral mixing enthalpy of liquid alloys [Bi-Cd-Ga-In-Pb-Sn-Zn] and the molar partial mixing enthalpies of the seven elements at the barycenter of this system have been determined by high-temperature calorimetry at 973 K. In order to use the Hoch-Arpshofen model, critical study of the thermodynamic properties and phase diagram of the 21 limiting binary systems have been compiled. The calorimetric results of the integral and partial enthalpies have been compared to the calculated results obtained with the Hoch-Arpshofen model. These two sets of values are in good agreement and so we may envisage to use this model for the estimation of the excess functions of formation of multicomponent alloys without strong interactions.