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Molar Entropies

The molar entropies of dense objects tends to be smaller than not dense objects so \bgroup\color{blue}$ G = H -TS$\egroup tends to favor not-dense objects (gases) at high temperatures. The molar entropies of complex crystals are generally larger than simple ones. Molar entropies of ordered systems like crystals generally are generally smaller than those with no long-range order like fluids. Apparently, entropy has something to do with the number of different ways a system can be rearranged and still have the same energy.

W. Craig Carter 2002-09-05