The ice turns to water, and its molecules agitate like popcorn in a popper.

If the reaction involves multiple phases, the production of a gas typically increases the entropy much more than any increase in …

To get an intuitive understanding of these terms, consider the example of a political poll. For example, heat transfer cannot occur spontaneously from cold to hot, because entropy would decrease.

Entropy is … The total entropy of a system either increases or remains constant in any process; it never decreases. Dissolving salt in water is another example of increasing entropy; the salt begins as fixed crystals, and the water splits away the sodium and chlorine atoms in the salt into separate ions, moving freely with water molecules. Entropy is a measure of the unpredictability of the state, or equivalently, of its average information content. Entropy is very different from energy. A chunk of ice has low entropy because its molecules are frozen in place. Add heat energy and entropy increases. Entropy is the only quantity in the physical sciences (apart from certain rare interactions in particle physics; see below) that requires a particular direction for time, sometimes called an arrow of time.As one goes "forward" in time, the second law of thermodynamics says, the entropy of an isolated system can increase, but not decrease. An increase in the number of moles on the product side means higher entropy. I'm currently looking at Principles of Chemistry by Atkins, and I have a few questions involving entropy. A decrease in the number of moles on the product side means lower entropy. Example: An egg the has splattered all of a sudden recombines off the floor and becomes a whole egg again. Usually, such polls happen because the outcome of the poll is not already known.