14. Which of the following is not a state function? a. Internal Energy b. Free E

Question

14. Which of the following is not a state function? a. Internal Energy b. Free Energy c. Enthalpy d. Entropy e. Heat 15. The second law of thermodynamics states that a. the entropy of a perfect crystal is zero at 0 K b. the entropy of the universe is constant. c. the energy of the universe is increasing. d. the entropy of the universe is increasing. e. the energy of the universe is constant. 16. Which of the following are always true for a spontaneous process? I. 4Sss 0 V. 4Gss 0 II. ,AS. 0 III. ,AS 0 univ b. I and II d. I and III e. III and IV 50 J/K. Under what temperature parameters is the 40 k and AS 17. For a particular reaction, 4H reaction spontaneous? L. On AD T (0.05) a. When T

Explanation / Answer

14. Correct answer is E

15. Correct answer is D. The entropy of the universe increases

16. Correct answer is C DelS>0

17. Correc answer is B.

DelG= DelH-TDelS

at equilbrium DelG=0

DelH= T delS

T= delH/ DelS =40*1000/50= 800 K

DelG. becomes spontaneous at >800K

18. Correc answer is E. More information pertaining to enethalpy change and entropy change has to be given.

19. Correct answer is D. DelG<0

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