Case Ia

Rule 1(a):
An apolar solute will partition similarly (i.e., partition coefficients vary by less than a factor 3) to all apolar and monopolar phases because only vdW interactions are involved in the cavity formation as well as in the interactions between solute and solvent. Empirically one finds that such partition coefficients typically vary by less than a factor 3.

apolar molecules in
apolar or monopolar phases:

only van-der Waals
Interactions