CHY 102 Chapter Notes - Chapter 17: Boltzmann Equation, Gibbs Free Energy, Boiling Point
1 Jan 2016
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Greater temperature and larger volume, greater number of gas molecules = more microstates. Greater number of mols, (of each individual element) greater temperature, greater volume = greater entropy. Chemical reactions = increase in entropy of the universe, or the reaction would not occur. Gibbs energy equation: delta g(rxn) is deltah - temperature(deltas) Spontaneous = reaction will occur without requiring any help, even if extremely slow. When delta h and delta s are both negative = spontaneous = negative gibbs energy. Gibbs energy equal to zero (0) = already in equilibrium. When calculating boiling point of a compound, find the change in h, and change in s, then put into the equation tpc= pch / pcs , (check units) and convert to celcius if required. When asked for the sign of entropy change (product reactant) negative sign means products are less random delta so = (delta ho delta go) / t at stp, t = 298k.
