03/15/2013 Lecture 25
Martin M. PHGY Tutor
Features of Entropy
System always tend towards a greater level of disorder. Entropy is calculated by counting all the
available states of a given system, and the largest number of indistinguishable microstates is the
entropy (W). The entropy always increases for any spontaneous reaction. Overall, the entropy is
1. How does entropy change with temperature and pressure?
Increasing temperature increases entropy. There are many more ways to arrange the
molecules at a higher temperature and there is greater disorder. It's related to heat
Increasing volume increases entropy. The energy levels become more spaced together
and makes space for more energy states available.
Change with Volume Change with Temperature