090413_miniQuiz2_answer - (a) μ i solution = μ i * +...

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Your &ame . [ /4] Chem340 Physical Chemistry for Biochemists Mini Quiz 2 Apr 13, 2009 Q1. Which relationship is correct for an mixing? Choose one incorrect answer. (a) Δ G 0 mixing < 0 (b) Δ S 0 mixing < 0 (c) Δ V 0 mixing 0 (d) Δ H 0 mixing 0 Q2. Pure water and a mixture of water and sucrose are separated by a membrane that permits only water to go through. Which statements are correct for the chemical potential for each compartment and the osmotic pressure? Choose TWO. (a) In the equilibrium state, the pressure of the compartment for the mixture (H2O + sugar) is increased. (b) In the equilibrium state, the pressure of pure H2O is increased. (c) H 2 O moves into the mixture component until the system reaches equilibrium. (d) H 2 O moves into the pure H 2 O component until the system reaches equilibrium. Q3 . For an ideal solution, which relationships are correct? Choose THREE that are correct. (Hint: chemical potential is generally decreased by mixing. Is ln(x) is positive or negative?)
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Unformatted text preview: (a) μ i solution = μ i * + RTln(P i /P i *) (b) μ i solution = μ i * + RTln(x i ) (c) μ i solution = μ i * + RTln(a i ) (d) μ i solution = μ i * - RTln(P i /P i *) (e) μ i solution = μ i * - RTln(x i ) (f) μ i solution = μ i * - RTln(a i ) Q4. Which relationship is Henry’s law? Choose one. (a) P i = x i P i * (b) Pi = x i P total (c) Pi = n i RT/V (d) P i = x i k H i Q5. A + 2B ↔ 3C + D is in equilibrium. Which equilibrium constant is correct for a dilute non-ideal solution. Assume that K satisfies that K = exp(-Δ G reaction /RT)? Choose one. eq c j and eq a j denote the concentration and activity of the species j. (a) ( ) ( ) ( ) ( ) 2 B 1 A 1 D 3 C eq eq eq eq c c c c K = (b) ( ) ( ) ( ) ( ) 2 B 1 A 1 D 3 C − − = eq eq eq eq c c c c K (c) ( ) ( ) ( ) ( ) 2 B 1 A 1 D 3 C − − = eq eq eq eq a a a a K (d) ( ) ( ) ( ) ( ) 2 B 1 A 1 D 3 C eq eq eq eq a a a a K =...
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This note was uploaded on 04/14/2010 for the course CHEM 340 taught by Professor Yoshitakaishii during the Spring '07 term at University of Illinois, Urbana Champaign.

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