(a) Entropy is a universal measure of the "disorder" in the mass points of a system.
(b) Entropy is a universal measure of the irreversibility of a state and is its criterion as well.
(c) Entropy is a universal measure of nature's preference for the state.
(d) Entropy is a universal measure of the spontaneity with which a state acts when it is free to change.
(e) Entropy of a system can only grow.
(f) Entropy asserts the essential one-sidedness of Nature.
(g) There exists in Nature a magnitude which always changes in the same sense.
(e), (f), and (g) imply change and therefore, strictly speaking, should not be mentioned here but postponed to a later section.
[SECTION E]
EQUIVALENTS OF CHANGE OF ENTROPY IN MORE OR LESS GENERAL PHYSICAL TERMS