This condition is given as 0 on the entropy scale. To determine S for a substance, start as close to absolute 0 as possible and add E in small increments. Calculate S for each addition. The results of such measurements are given in table 20-1. These are standard molar entropy values.
Entropies usually increase when a pure liquid or solid dissolves in a solvent.
Such predictions are easier to make than for enthalpy changes. The total entropy of the university is constantly increasing. When anything happens, matter, energy or both become more dispersed or disordered. Therefore a product-favored reaction is accompanied by an increase in entropy of the universe. Once a prediction has been made conditions can be modified and corrections for such modifications made.