19. Which of the following statements are true? D Liquids have more entropy than

Question

19. Which of the following statements are true? D Liquids have more entropy than their solids. Il) Solutions have more entropy than the solids dissolved III) Gases and their liquids have equal entropy IV) Gases have less entropy than their solids. V) Entropy of a substance increases as its temperature increases A) II), III), and V) B) I), III), and V) C) I), IV), and V) D) I), II), and V) E) II), IV) and V) 20. Choose the INCORRECT statement. A) One form of the second law of thermodynamics is all spontaneous processes produce an increase in the entropy of the universe. B) Gibbs energy is defined by: G = H-TS. c)If G 0, the process is nonspontaneous E) IAG = 0, the process is spontaneous. In a sealed container, the rate of dissolving is equal to the rate of crystallization. Therefore we would expect: 21. D) AS = 0 E) must know // to determine 22. Consider the reaction: H:X(g) HX(g) + x(g) ArHo 18.4 kJ/mol ArSo= 23.1 J/mol K What is Keq for this reaction at 525 K? A) 0.387 B) 0.993 C) 0.238 D) 4.23 E) 1.01 23. For the reaction: CO(g) + 2 H2(g) CH3OH(g) Kp=914 at 350 K and Kp = 2.05 x 104 at 298 K. What is the value of ArHo A) 49.9 kJ/mol B) 2.08 x 103 kJ/mol C) 3.74 x 102 kJ/mol D) 217 kJ/mol E) 446 kJ/mol

Explanation / Answer

19. Option D is correct.

20. Option E

21. At this point, dynamic equilibrium is reached. So dG=0 Option C

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