There is no right way to teach (or learn) pchem, which is reflected in the fact that textbooks order the topics in different ways. I personally favor a molecular approach, in which QM and associated topics are taught before statistical mechanics, thermo, and kinetics, but that's actually not the traditional way it was taught. The traditional way (thermo first, then QM) reflects the historical order of development, even though QM radically changed how we understand thermodynamic concepts.
Anyway: either way is fine as long as they don't list one course as prerequisite of the other. In that case they may use concepts learned in the earlier course, which could make it difficult for you.