Translational, Rotational, and Internal Entropies
for Dimer Formation: A + B <=> A-B (ca;/K.mol)

System A B A-B ΔS
Gas
S trans 30 30 30 -30
S rot 20 20 20 -20
S int 5 5 20 +10
Gas -> Solution -10 -10 -15  
S sol 45 46 55 -35 Correspond to 108-109 M)