CHM135H1 : Chapter 20.docx
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CHM135H1 Full Course Notes
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All real processes occur spontaneously in the direction that increases the entropy of the universe increases. A perfect crystal has 0 entropy at absolute 0 (0 k) Gibbs free energy: determines the spontaneity of a process and the useful available energy from it. Using free energies to predict direction in chemical reactions. Relation of gibbs free energy to maximum work. ; work is done by a system during a spontaneous reaction; constant t and p. ; work is done on a system during a non-spontaneous reaction; constant t and. Relation of gibbs free energy to equilibria constants. Temperature dependence of gibbs free energy/relation to enthalpy and entropy. 0; only spontaneous at lower temperatures becomes smaller than and is negative. Change in free energy, enthalpy, entropy with phase changes (solid liquid gas)
