MeltingVaporizationDissolvingHeatingNote:For small, highly charged ions such as Al3+ and Fe3+, the decrease in entropy due to hydration can outweigh (超過) the increase in entropy due to mixing and dissociation so that the entropy change (S)for the overall process can actually be negative.In addition to translational motion, molecules can also execute rotational motions and vibrational motions.As T increase, the energies associated with all types of molecular motion increase. distributed or dispersed among the quantized energy levels. more microstates entropy increase!