45. If a chemical reaction has a positive change in entropy, AS, then:A) the reaction is exothermic.B) the disorder of the system increases.C) the Gibb's Free Energy would also be positive.D) The system becomes more ordered and less random.46. Which of the following involves a decrease in entropy?A) the sublimation of solid CO2 into CO2 gas.B) the dissolving of NaCl in water.C) the evaporation of liquid ethanol.D) the freezing of liquid water into ice.47. Which reaction is likely to have a negative change in entropy?A) 2 NH3 (g) → N2 (g) + 3 H2 (g)B) Cao (s) + CO2 (g) → CACO3 (s)C) N204 (g) → 2 NO2 (g)D) 2 C (s) + O2 (g) → 2 CO (g) 48. The dissolving of NH4NO3 in water readily occurs. As it dissolves, thetemperature of the water decreases. What are the signs of AH, AS, and AG for thedissolving of NHẠNO3 in water?A) AH > 0, AS > 0, and AG < 0B) AH > 0, AS > 0, and AG > 0C) AH < 0, AS < 0, and AG < 0D) AH < 0, AS > 0, and AG > 049. If a reaction is exothermic and its entropy increases, you would expect thereaction to:A) always be thermodynamically favored and spontaneous.B) be thermodynamically favored and spontaneous at low temperatures.C) be thermodynamically favored and spontaneous at higher temperatures.D) never be thermodynamically favored and would be considerednonspontaneous.50. If a reaction is exothermic and its entropy decreases, you would expect thereaction to:A) always be thermodynamically favored and spontaneous.B) be thermodynamically favored and spontaneous at low temperatures.C) be thermodynamically favored and spontaneous at higher temperatures.D) never be thermodynamically favored and would be considerednonspontaneous.

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45. If a chemical reaction has a positive change in entropy, AS, then: A) the reaction is exothermic. B) the disorder of the system increases. C) the Gibb's Free Energy would also be positive. D) The system becomes more ordered and less random. 46. Which of the following involves a decrease in entropy? A) the sublimation of solid CO2 into CO2 gas. B) the dissolving of NaCl in water. C) the evaporation of liquid ethanol. D) the freezing of liquid water into ice. 47. Which reaction is likely to have a negative change in entropy? A) 2 NH3 (g) → N2 (g) + 3 H2 (g) B) CaO (s) + CO2 (g) → CaCO3 (s) C) N204 (g) → 2 NO2 (g) D) 2C (s) + O2 (g) → 2 CO (g)

45. If a chemical reaction has a positive change in entropy, AS, then: A) the reaction is exothermic. B) the disorder of the system increases. C) the Gibb's Free Energy would also be positive. D) The system becomes more ordered and less random. 46. Which of the following involves a decrease in entropy? A) the sublimation of solid CO2 into CO2 gas. B) the dissolving of NaCl in water. C) the evaporation of liquid ethanol. D) the freezing of liquid water into ice. 47. Which reaction is likely to have a negative change in entropy? A) 2 NH3 (g) → N2 (g) + 3 H2 (g) B) CaO (s) + CO2 (g) → CaCO3 (s) C) N204 (g) → 2 NO2 (g) D) 2C (s) + O2 (g) → 2 CO (g)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 9RQ: What characterizes an electrolytic cell? What is an ampere? When the current applied to an...

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