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Unformatted text preview: ∆ S value for a spontaneous process is less than zero, what is the sign of ∆ H? 11. What is the sign of ∆ S when solid copper is cooled from 100 ° C to 25 ° C? Why? 12. Given the following reaction: 2A(g) → 3B(g) a. If ΔG ° for A is –370.4 kJ/mol and B is –300.4 kJ/mol at 25 ° C, what is ΔG ° ? b. Is the reaction spontaneous? c. Calculate ΔG r when the partial pressure of A is 2atm and B is 3atm. 13. The partial pressures of NO 2 and N 2 O 4 in a reaction flask at 298K are 0.30atm and 0.15atm, respectively. What is the value of ΔG r under conditions for 2NO 2 (g) → N 2 O 4 (g) if K = 8.8? 13. Predict the sign of ∆ G ° for reactions with each of the following equilibrium constants: a. K << 1 b. K = 1 c. K >>1 14. If K < Q, is a reaction spontaneous as written? 15. If ΔG r ° = 15.94kJ/mol, what is the value of K?...
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 Spring '08
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 Thermodynamics, Reaction, entropy change

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