A quartz sample has been studied by adsorption and immersion methods after a classical characterization of its properties. The combination of adsorption isotherms and of immersion measurements allows the calculation of enthalpies and entropies of adhesion. The studied quartz is slightly hydrophobic but the immersion enthalpy into water is the most energetic one of all the solvents studied. These results are explained by the influence of intermolecular forces such as acid-base interactions in the interfacial layer.