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Unformatted text preview: Test 3 Review Suggestions 1 st Law of Thermo conservation of energy (never lost, tends toward entropic forms - heat) 2 nd Law of Thermo entropy of the universe, S univ , always increases ( S univ = S system + S surroundings ) Be able to judge what has more absolute entropy (compare two things or compare products vs. reactants) Understand how a thermal entropy change in the surroundings can offset a positional entropy decrease in a system at const P , S = H / T , so: S univ = S system + H surr / T (think of freezing H 2 O; also, at equilibrium, S univ = 0) Understand how the change in Gibbs Free Energy, G, expresses the above bold equation in terms of the system G = H system- T S system ; negative G spontaneous; positive G not; G = at equilibrium Be able to predict signs of H , S , G like with rubber band and dry ice Be able to think through what...
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- Fall '11