The Gibbs free energy associated with the partitioning of organic contaminants between air and solvents (,,G) can be considered as the sum of the free energy contributions for cavity formation in the solvent ( 12Gcaval) and for the formation of intermolecular interactions between the contaminant and the solvent (12Gmquid). In principle, both 12Gconty and 12Giloud can have contributions from van der Waals (vdW) and hydrogen-bonding (H) interactions. Thus, we can write jGi as a sum of its free energy components: dG=(Gsinfin+GGratt)+(Gkosax+GGott) This leads to four cases with respect to the involvement of hydrogen bonding: 1. Hydrogen bonding is not in involved in the cavity formation or intermolecular interaction terms (i.e., Gsorr=0 and Giant=0 ) 2. Hydrogen bonding is involved only in the cavity formation term (i.e., Gmis=0andGioisk=0) 3. Hydrogen bonding is involved only in the intermolecular interaction term (i.e., Gerinyt=0andGiyatt=0) 4. Hydrogen bonding is involved both the cavity formation and intermolecular interaction terms (i.e., Gtie=0 and Giq,0i=0 ) Assign each of the following equilibrium solvent-air partitioning processes to the appropriate case above