Chapter 17 problems

# Chapter 17 problems - CH17-PROBLEMS Page 1 2 For a reaction...

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CH17-PROBLEMS Page 1 2. For a reaction to occur spontaneously as written, which of the following must be true ? a) Entropy of the system must increase. b) The enthalpy of the surroundings must increase. c) The free energy change must be negative. 3. Which of the following represents an increase and which a decrease in the entropy of the system: a) the freezing of acetic acid b) sublimation of para-dichlorobenzene c) burning of gasoline 10. The free energy change of a reaction is a measure of which of the following: a) the quantity of heat given off to the surroundings b) the direction in which a net reaction goes c) the increased molecular disorder produced in the reaction d) how rapidly the reaction occurs 18. If ΔG = 0 for a reaction, then which of the following is true ? a) ΔHº = 0 b) ΔSº = 0 c) K = 0 d) K = 1 19. Indicate whether the entropy of each system increases or decreases a) CH 3 OH (l) CH 3 OH (g) b) N 2 O 4 (g) 2 NO 2 (g) c) CO (g) + H 2 O (l) CO 2 (g) + H 2 (g) 23. What is wrong with each of the following statements for each of the following reactions to occur spontaneously ?

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