1. CHEM 433 - 10/26/11 IV. 2nd Law of THERMO
• Standard Reaction Gibbs energies (3.6)
—> what do they really mean?
—> what don’t they mean?
(Spontaneous vs. Product Favored…)
• “Machinery” (3.7)
- Properties of dU (3.8)
HW – updated …
READ: CHAPTER 3 …

2. Let’s Calc rG° for:
H2 (g) /2 O2 (g) —> H2O (l)
fG°: kJ/mol
Using fG°’s (This is sorta silly…)
Using rH° ( kJ/mol) and rS° ( J/K mol) (we calculated these earlier in the semester …)
(Note, before we saw that Suniv for the reaction was very positive - about 800 J/K mol!)